1TX Mode: Bluetooth 0 transmitter transmits sound to wireless headphones or speakers via AUX or RCA jack plugged into a non wireless device, such as a TV or MP3 player. 2RX Mode: Bluetooth 0 receiver can be connected to wired speakers or car sound input port and receive sound from smartphone via wireless function. 3Low Latency, Wireless Device Connection: 2 in 1 wireless adapter with HiFi stereo sound and low latency; can be connected to wireless speakers or headphones that support A2DP protocol to form a wireless sound transmission network. 4Wide Application: Bluetooth 0 transmitter receiver can be used in TV, CD, home theater and other devices, also can be connected to cell phones or computers to play music. 5Stable Performance: 2 in 1 bluetooth aux adapter with stable connection, the latest chip and well designed software. Small size, light weight, easy to carry; brings CD like listening feast. 6Long Battery Life: Bluetooth 0 transmitter receiver can work while charging, and the installed battery can support wireless adapter and work 6 hours per full charge.