[Multifunctional Bluetooth transmitter and receiver] In TX mode: transfer your music from TV, CD player, Ipod, laptop to Bluetooth headset or stereo (you can connect two devices at the same time); in RX mode : Convert the music in your mobile phone or computer to audio, allowing you to freely enjoy the sound quality of HIFI CD. Bypass mode: the cable connection between the TV and the speakers, you no longer need to plug in any wires, and easily switch to the other two modes. 【262FT Ultra Long Range】Using the latest Bluetooth 5.0 technology and dual antenna design, our Bluetooth transmitter/receiver can achieve a line-of-sight range of up to 262 feet (80 meters) and up to 80-110 feet (25-35m) in the open air Indoors, no matter where you go in a big house, you can ensure a stable connection without losing the signal. *Note: The operating range may be affected by the Wi-Fi router, wireless TV adapter, and also depends on the receiving device. [Extreme listening experience] It supports low latency, almost eliminates visual and auditory delays, and can transmit audio to two Bluetooth headsets at the same time, making VIKEFON BT-B15 Bluetooth headsets the best choice for watching TV and movies. Note: In order to achieve this low latency, your receiving settings must support low latency. [Easy to set up and easy to use] It supports memorizing your settings after power off. Support AUX / 2 RCA audio output standard, compatible with 99% of TVs on the market (note: digital optics is not supported), if you need to support digital optics, please choose our BT-B21 or BT-B22, etc. The setup is very simple, just connect your transmitter/receiver to the socket and audio system, pair it with your phone or tablet to enjoy music. Product main parameters: Bluetooth chip: CSR chip Bluetooth version: V5.0 Bluetooth protocol support: RX: A2DP AVRCP TX: A2DP Transmission distance: >80M (open area) Working hours: RX>10H ;TX>8H Charging voltage: DC 5V Audio output mode: RCA, 3.5MM stereo audio interface Codec: TX: Aptx LL, APTX, SBC, FS; RX: Aptx LL, Aptx, SBC, AAC, FS. Packing List: 1 Bluetooth adapter 1x 3.5mm audio cable 1x USB charging cable 1x RCA audio cable 1x User Manual