SENTRY BT899 True Wireless Earbuds User Manual
- June 5, 2024
- Sentry
Table of Contents
SENTRY BT899 True Wireless Earbuds
**User Manual**
Using your True Wireless Earphones
Charge the earbud and case first. Make sure charging case and earbuds are
fully charged.
STEP 1 Turn off the Bluetooth function from your music device. E.g.,
Mobile phone or music device.
STEP 2 Take out the earbuds from the charging case after they have been
charged. The
earphones will automatically turn-on. You will hear “Power On”, Wait 5 seconds
so that both
earbuds can connect to each other. After the dual earbuds have connected to
each other,
you will hear a tune to suggest that both earbuds are paired successfully, and
the status
of the Right earbud will have blue light and red light flashing alternatively
but Left earbud
will have very slowly flashing blue light.
STEP 3 You can now turn on the Bluetooth function of your mobile phone or
audio device. Search and select BT899 on your device and connect. When the
earbuds are connected with the device successfully, you will hear “ Connected”
and earbuds will have very slowly blinking blue light.
If you turn off the bluetooth function on your mobile phone, you will hear
“Disconnected”, and the status of the Right earbud will have blue light and
red light flashing alternatively but Left earbud will have very slowly
flashing blue light. The pairing mode between both earbuds and device will
remain for about 5 minutes, After that earbuds will turn auto-off if
no device connection in 5 minutes, and you will hear “power off”.
*After the initial settings, both earphones will auto pair with your device directly and you can skip Step 1 and 2.
- Fig 1 (shown on the image).
Button Function
On/Off
Turn on : Long press both left and right earphone (see Fig 1) for 3 second to turn on earphones; Long press left or right earphone top button (see fig 1) for about 6 seconds, to turn off earphones
Answer / Hang Up
When there is an incoming call,short press the top button (Fig 1) on the left
or right earphone to answer the phone (see Fig 1 on the image)
During the call, the earphones with slowly flashing blue light. short press
the top button (Fig 1) on the left or right earphone to end the call.
- When playing music, and there is an incoming call, music will be auto-paused and auto play when end the call.
Reject / Call Back
When coming call, long press left or right earphone about 2 seconds to refuse
the call. (fig 1)
Three-click the right earphone to resume back to the last call, three-click
the left earphone to open the voice assistant.
Play / Pause Music
To pause playing music, short press either the left or right earbud (Fig 1) to
pause.
To continue playback, short press either the left or right earbud (Fig 1) to
continue playback.
If one of the earbuds have run out of battery, the other one will continue to
work until it runs out of power also.
Last / Next Song Control
When playing music, double-press the left earphone (Fig 1) to switch to the Last song; Double-press the right earbud to switch to the next song.
Charging the case and earbuds :
Charge the charging case (fig 2)
The charging case (fig 2) charges the earbuds. It is important that the charging case is recharged. To do this, Insert the provided USB charging cable to charge the charging case (Fig 2) with a USB power adapter.
The LED light on the case will keep on flashing when it is charging. When
fully charged, the LED lights will keep on and still.
Charging the case will take 5 hours to fully charge the case but charging
amount times may vary depending on battery status.
Note: When there is no charge left on the charging case, the case will start
to flash to announce low battery and then turn off completely.
Charge the earphones (Fig 1):
The charging case should be fully charged and have sufficient power before it
can charge the earbuds. Put the earphones into the correct position on the
charging case (fig 2) for charging.
Turn off the earbuds by long pressing the top button of both earbuds (fig1)
for 6 seconds before placing them into the case
If the earbuds are not placed securely into the case, it may not charge.
Please take out the earbuds and re-insert them in the case. Also make sure the
lid is properly closed so that charging the earbuds can start. Using large
earpads could also obstruct the closure of the case, and so may need to be
removed.
When the Earphones are charging properly, the led light on the earphone and
the charging case will also turn on and still to confirm that charging has
started. When the earphones are fully charged, the led light on earphones and
charging case will turn off.
When earphones are on low battery, you will hear a tune to announce low
battery and the earphones led will start to flash quickly. When the earphones
run out of battery, you will hear “power off”, and the earphones will be auto
off.
Note: When the charging case runs out of the battery, It is important to Turn
off both earphones before charging them in the charging case. (Turn off by
pressing both earbuds (see fig 1) for 6 seconds. If there is no power on the
charging case, the earbuds will not auto- turn off when they are put back into
the charging case. Therefore, the earbuds need to be manually turned off by
pressing both the earbuds for 6 seconds simultaneously before putting back to
the charging case. Charge the charging case (fig 2) so that the earbuds can be
recharged as well.
Frequently asked questions
Bluetooth earbuds cannot turn on?
- You can check if earbuds is with power or not ? if not, please fully charge both earbuds before turning it on. (Also charge the charging case as well to make sure there it has enough power to charge the earbuds)
- Make sure the earbuds are properly charged by placing them securely into the charging case (fig 2) .
- Turn on the earbuds please long pressing both earbuds for 3 seconds (fig 1)
Bluetooth earbuds signal is unstable ?
-
Restart the Bluetooth earbuds by turning them off and then on. To do this long press (fig1) for 6 seconds to turn off and long press 4 seconds to turn on again.
-
Please kindly check the compatibility and calling communication quality of the mobile phone.
The playing device should be no more than 1.5 meters (4 feet) from the earbuds -
The distance between both earbuds should be no more than 0.5 meter (2feet) apart
-
Interference from other devices or areas (crowded areas) may cause some signal instability. Move to another area to see if it improves.
Why can’t I can’t hear voice / playback?
- Please kindly check if your playback device volume is on or on mute status.
- Please kindly check if Bluetooth earbuds and phone are connected well. Resetting the device may be necessary (see below on how to reset)
- Check the distance between earbuds and phone is too.
Reset : If the earbuds are not pairing correctly or continue to have
issues , please delete the earbuds from your phone by going to the phone’s
Bluetooth settings and removing it.
Then follow Steps 1-3 on the first page of this manual to re-pair your earbuds
to your phone device.
If earbud function is are not working, then reset the earbuds by long pressing
both earbuds (fig 1) for about 8 seconds. Then follow Steps 1-3 on the first
page of this manual to re-pair your earbuds to your phone device.
If after some time, the earbuds stop charging, try to use a dry cotton swab to
clean the bottom charging points on the earbuds and the inductive pins on the
charging case to remove any dusts and sweat.
Specifications:
- Model: BT899
- Bluetooth Version: 5.3
- Power Input: DC 5V
- Earphone Working Time: About 6 hours at 50% volume
- Earphone battery capacity: 40mAh+40mAh=80mAh
- Charging Case battery capacity: 400mAh
- Support a2dp\avctp\avdtp\avrcp\hfp\spp\smp\att\gap\gatt\rfcomm\sdp\l2cap profile
Limited 90-Day Warranty: Sentry warrants this product to be free from defects in materials and workmanship for 90 days from the date of original purchase. This warranty does not pertain to damage resulting from accident, abnormal use, misuse or neglect. Any defective product will be replaced if returned to an authorized Sentry dealer or to Sentry directly at: PO Box 885, One Bridge Street, Hillburn, NY 10931. Please enclose a $5 check for return shipping.
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Sentry Industries Inc is under license. Other trademarks and trade names are those of their respective owners.
Sentry Industries inc declares that radio equipment BT899 is in compliance with Directive 2014/53/EU. The EU declaration of confirmity is available at https://sentryindustries.com/european-declaration-of-conformity/Confirmity with Directives.
This product is CE marked to denote conformity with Directives 73/23/EEC (low voltage) and 89/336/EEC (Electromagnetic Compatibility) , as amended.
Environmental Protection
Waste electrical products should not be disposed of with household waste.
Please recycle where facilities exist. Check with your Local Authority or
retailer for recycling advice.
Supplier’s Declaration of Conformity 47 CFR 47 CFR Part 15.21, 15.105(b)
Compliance Information Sentry Bluetooth Responsible Party
– SENTRYINDUSTRIES INC
ONE BRIDGE STREET, HILLBURN,
NY10931, USA
TEL +1 8457532910
FCC Compliance Statement
“This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.”
FCC ID:2ACP4LBT899 Model #BT899
“NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help
Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.”
USB Type-C® and USB-C® are registered trademarks of USB Implementers Forum.
Charging your device
Only use a power adapter with applicable country regulations and international and regional safety standards. Other power adapters may not meet applicable safety standards, and using such adapters could pose a risk of death or injury
Avoid prolonged skin contact with the charging cable and connector when the charging cable is connected to a power source because it may cause discomfort or injury. Sleeping or sitting on the charging cable or connector should be avoided.
WARNING: To prevent possible hearing damage, do not listen at high volume levels for long periods. For traffic safety, do not use earphones while driving or cycling.
If you have a pacemaker or other electrical medical devices, you should consult your physician before using the product.
Choking hazard : The product, packaging and some of the included accessories may present a choking hazard to small children. Keep these accessories away from small children. The bags themselves or the many small parts they contain may cause choking -if ingested.
Danger : Improper battery replacement may cause an explosion and injury.