HB-T01 Bluetooth Transmitter for TV CSR4.0 Car Music Transmitter Wireless Audio Stereo Phone Audio Adapter for Mobile Phone Computer Color: BLACK Specifications: Model: HB-T01 Bluetooth version: 4.0 Transmission distance: >10m (>32 feet) Continuously working time: 5 hrs Charging time: 1.5 hrs Unit size: 48.5*34.5*11mm