This is a breakout board of an Electret microphone, sound sensor. Which is essentially provide your Microcontroller an ear to detect or listen sound wave. This microphone has 100Hz-10kHz with an 60x mic preamplifier to amplify the sounds of voice,
Wiring the XS3868 / OVC3860 Stereo Bluetooth 2.0 +EDR Module Board
The OVC3860 is a low power single chip Bluetooth RF transceiver baseband processor for Bluetooth stereo solutions. The OVC3860 is a 2.4GHz RF transceiver, Bluetooth v2 + EDR (Enhanced Data Rate) baseband, can transfer high quality 20bit stereo audio CODEC