Using Time: Listen to music for about 10 hours and stand by for 30 days Transmission Range: 10m (barrier free) Support Protocol: A2DP/AVRCP Using Method: Drive free Product Material: High strength fireproof PC What the Main Functions: 1.Bluetooth receiver, 2.Bluetooth Transmitter; 3. TF card playback, infrared remote control; 4.key operation; 5.Support NFC; 6.Support Mic, Handsfree Call; 7.Photograph function; 8.Built-in battery, support 10 hours playing; 9.Lossless sound quality; 10.Bluetooth 5.1; 11.Lavalier; Support Devices: All kinds of wired speakers/headphone,desktop computer, laptop, TV, power amplifier,projector etc Package included: 1x Bluetooth adapter. 1x 3.5MM audio cable. 1x Type C Charging cable 1x User manual.