UGREEN CM667 Bluetooth Audio Receiver/Transmitter User Manual

UGREEN CM667 Bluetooth Audio Receiver/Transmitter

Specifications

• Model: CM667
• Bluetooth Version: 5.2
• Frequency Band: 2400MHz-2483.5MHz
• Max. RF Output Power: 4 dBm (conducted)
• Transmission Distance: 10m/33ft (no blocking)
• Bluetooth Profile: A2DP/AVRCP/HSP/HFP
• Codecs: RX: SBC/AAC TX: SBC
• Frequency Response: 20Hz-20kHz
• Output Level (Receiving): 630mV rms RL=100k
• Input Level (Transmitting): 0.75Vrms
• SNR: 92dB A-wt.
• THD+N: 0.1%
• Mic Sensitivity:
• Audio Port: 3.5mm audio
• Charging Port: USB-C
• Battery Type: Polymer Lithium-Ion Battery
• Battery Capacity: 300mAh 3.7V (1.11Wh)
• Limited Charging Voltage: 5.25V
• Charging Time: About 2 hours
• Operating Time: TX: About 27 hours RX: About 22 hours

Package Contents

• 1×Bluetooth Audio Receiver/Transmitter
• 1×USB-A to USB-C Cable
• 1× 3.5mm Audio Cable
• 1× 3.5mm to RCA Audio Cable
• 1× 3.5mm Audio Adapter
• 1 × User Manual
• 1 × Quick Start Guide

Product Overview

The product is a Bluetooth Audio Receiver/Transmitter that allows you to wirelessly stream audio between devices.

Indicator & Voice Prompts

Transmitter Mode (TX)

In TX mode, you can wirelessly stream audio from non-Bluetooth devices to Bluetooth earphones or speakers.

Connecting to 1st Bluetooth Earphones (e.g., AirPods)

1. Slide to TX mode and press the button for 3s to turn on the product. It will enter pairing mode (indicator flashes red and blue).
2. Put the AirPods into pairing mode by holding the button on the charging case until the blue indicator lights for 3s.
3. Plug the product into the audio source device (e.g., TV) to enjoy wireless audio.

Connecting to 2nd Bluetooth Earphones or Speakers

1. Complete pairing with the first set of headphones as above.
2. Put the second set of headphones into pairing mode following its manual.
3. Double-click the button on the product to enter pairing mode with the second device.

Receiver mode (RX)

Wirelessly stream audio from your Bluetooth-enabled phones, tablets, or computers to your non-Bluetooth stereo system (amplifiers, car stereos, etc.).

Connects to 1st Phone (Take An iPhone as An Example)

1. Slide to “RX” mode, then press the button for 3s to turn on the product. It will automatically enter pairing mode, and the indicator will flash red and blue alternately.
2. Open up your iPhone’s Bluetooth list and connect to “UGREEN-CM667”. The blue indicator will be on for 3s and the iPhone will show “connected” when pairing is successful.
3. Plug it into an audio output device (e.g. speaker) to play music.

Connects to 2nd Phone (or iPad)

1. Complete the pairing with the 1st phone. Double-click the button, then the indicator will flash red and blue alternately when it enters pairing mode.
2. Connect to “UGREEN-CM667” in your 2nd phone’s Bluetooth list. The blue indicator will be on for 3s and the phone will show “connected” when pairing is successful.

Note
It only supports music playback on one device at a time. If you need to switch to the 2nd device for playback, please turn off the audio source of the first device.

Tips

• After pairing is completed for the first time, it will automatically reconnect to the last paired device the next time you use it.
• Double-clicking the button will put the product into pairing mode. However, if it has connected to 2 devices already, you need to disconnect one of them first and then double-click the button to connect to the new device.
• This product can save a maximum of 5 paired devices. When connecting to the 6th Bluetooth device, the first device in the memory list will be cleared automatically.
• The product will enter reconnecting mode when disconnecting from your device due to long distance. If the reconnection is not completed in 5 minutes, the product will automatically turn off.
• The product will automatically turn on when connected to the power supply. During the charging, the product will keep running and cannot be shut down.
• When the battery is low, the product indicator will flash red once every 10s, please charge it in time. The red indicator will turn on for 3s when charging starts, and a green indicator for 3s when the product is fully charged.
• The product protection mechanism will be triggered and the product will automatically turn off in two situations:
  1. the battery temperature is less than 0°C/32℉ or greater than 45°C/113℉ during charging.
  2. the battery temperature is less than -10°C/14℉ or greater than 60°C/140℉ when not in charge.

Clear Paired Devices List & Reset

1. Clear paired devices list
   After powering off, press and hold the button for 10s to clear the pairing information. The red/green/blue indicator will turn on alternately to indicate successful clearing.

2. Resetting
   After powering on, press and hold the button, then use the USB-C cable to connect the product to a power supply. The product will automatically restart and complete the resetting.

Warning

• The product contains a built-in polymer lithium-ion battery. Please do not dismantle, crush, squeeze or expose it to fire.
• Stop using it when the battery is submerged.
• Stop using it when it is swollen.
• Do not expose the product to excessive temperature.
• Keep out of reach of children.
• If the battery has been accidentally swallowed or placed inside any part of the body, please seek medical attention immediately

FAQ

Q: How do I clear the paired devices list?
To clear the paired devices list, press and hold the button for a few seconds until the indicator light flashes, indicating successful clearing of paired devices.

Q: How do I know the battery status?
The battery status is indicated by different colors and patterns of the indicator light. A solid green light indicates a fully charged battery, while a flashing red light every 10 seconds indicates low battery.

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