TX11 can wirelessly transmit sound of TV, computer, laptop, TV box, MP3, etc. to Bluetooth receiving devices such as: Bluetooth headsets, popular SOUNDBAR, Bluetooth speakers, traditional power amplifiers (Bluetooth receivers are required): It saves customers trouble of wiring, With placement of TX11 speakers, they can be placed arbitrarily according to user's preferences. The perfect sound effect can also be achieved without of wire. Not only that, but also suitable for night owls under certain circumstances, such as watching , midnight drama, etc., users need to bring a Bluetooth headset to watch by yourself, and it will not affect rest of your family and neighbors. TX11 is also a Bluetooth music receiver, you can easily install traditional audio to upgrade to Bluetooth audio. Using CSR BC5 Bluetooth chip can transmit music to two receiving devices at same time, 3.5MM headphone port input. No delay, no noise, both receiving and transmitting realize one-to-two function. Bluetooth version: V4.0 supports A2DP, AVRCP Wireless distance: more than 10 meters Battery capacity: 500MAH Working time: 8 hours Charging port: Micro-USB Charging voltage: DC 5V Charging time: about 2 hours Audio input mode: 3.5MM No call: not supported Colour: black Material: ABS Package Contents: 1 * Bluetooth adapter Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.