Description 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. Features: 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). More information please read on this page. Supported audio amplifier here. Check the demo video of EB8645 working with HT6872 amplifier board and speaker here.
