HiLetgo XS3868 Bluetooth Stereo Audio Module OVC3860 Stereo Bluetooth BT Module Supports A2DP AVRCP Range:10 meters Receive sensitivity:Better than-82 dB Data Rates:Up to 3 Mbps(over the air) UART Data transfer rate: 115200 bps Frequency: 2.402 ~ 2.480GHz