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EX8635 based on CSR8635 IC (green board), and EX8645 based on CSR8645 IC (blue board), stero audio, can connect to phone device.
EX8645 supports APT-X audio quality.
- Five function keys: PLAY, VOL +, VOL-, PREV, NEXT.
- Status LED:
- Pairing – two LEDs flash alternately,
- Paired – single LED flashes
- USB sound card function (tested, sound pretty good, but note: USB sound card and Bluetooth can not work simultaneously.);
- 3.2V low power alarm, 3.0V automatic shutdown, (can support AMS1117 power supply);
- The maximum charging current is set to 150MA (for 8635), or 250MA (for 8645), light off one led and turn on other one when charging finished.
- Stay pairing status when not paired
- Can simultaneously connect to two phones (the only way: boot automatically chainback last paired phone, the penultimate pairing the phone will need to manually connect);
- External amplifier mute pin available. When Bluetooth is muted, after a period of time, output low; when the module is playing, the output high (1.8V).