Feature:1.bluetooth version 4.0.2. Super clear stereo sound effect.3. Support bluetooth receiving devices such as bluetooth speakers, bluetooth headset, bluetooth receiver etc.4. Enjoy music on the bluetooth speaker/headset from your TV/DVD/MP3/MP4/ Hifi speaker/CD player without cables. Specification: Band DL-LINKbluetooth version 4.0 Model TS-BT35F03 Protocol A2DP HSP HFP OPP OBEX DUNFrequency 2.4GHZ-2.4835GHZTransmission rate 20 (Mbps)SNR85d BTHD0.05% Charging time 1-2 hours Standby time 72 hours Working time 8-10 hours Distance 8-15M, 20M (No obstacles) Package Included:1 X bluetooth Transmitter 1 X 3.5mm Audio Cable 1 X USB (Universal Serial Bus) Charger Cable 1 X English User Manua