Specifications:Model: KRC-86BSize: 30 x 30mm(L x W)Bluetooth version: V4.0 + EDRButton interface: 3 key 2.0 interfaceSupport equipment: 2Features:With CSR8630 Bluetooth chip, support A2DP, AVRCP. Bluetooth 4.0 + EDRNon-multi-plate patchwork, stable performanceUsing automatic control technology, without key operation, if the connection keys, cell phone or computer can control play / pause, up and down the song, volume addition and subtractionSupport two devices connected simultaneouslySupports off automatic connection function,that the next time you turn on automatically connect to the last connected devicePackage Included:1 x KRC-86B Bluetooth 4.0 Stereo Audio Receiver Module Board