Transmitter & Receiver:The Bluetooth adapter is a transceiver designed for 2-way high quality remote audio streaming. It brings new life to traditional electronics like home speakers, wired headphones to receive wireless music from cellphones, tablets, laptops, etc. It also can be a transmitter for TV, computers, etc. to connect those Bluetooth enabled system like Bluetooth speakers, Bluetooth earphones. Small, simple as it is, this black gadget is , and magical. STREAM WIRELESSLY:keep your old stereo or wired headphone alive with new Bluetooth wireless connection, pair with smart phone or tablet from up to 15m , and enjoy great music cable-free. No Lip Sync Delay:Built-in Low Latency codec ( LL) offers only slight delay about 40 milliseconds for smooth audio transmission. You can comfortably enjoy high clarity stereo sound while watching TV, Movie, Video, or focus on your lag-free online game playing without wires dangling when using hands free earphone. Specially, it also supports LL under receiver mode (RX). 3.5MM + RCA + Optical:You can use this wireless adapter for most media devices that support 3.5MM plug (AUX, RCA) and digital optical (SPDIF/TOSLINK), like & Android smart phone, , , , laptop, computer, earbuds, speaker, TV, CD/DVD player, etc. The optical transmission can deliver better signals and minimize noises to keep the best fidelity of sound. Fast Link & Re-Pairing:The latest Bluetooth 5.0 technology allows a fast connection to wireless devices with only 3-5 seconds. Conveniently, it can automatically reconnect to the last paired device easily once power on. Also, this transceiver has great compatibility to most Bluetooth enabled smartphones like iOS, , , , , , MI, , , etc. Specification: 1.Bluetooth version: 5.0 with Low Latency 2.Bluetooth chipset: CSR 8675 Class II 3.Supported codecs: -HD,-LL,, Low Latency, AAC, 4.Bluetooth range: up to 20 meters, 66 feet 5.Bluetooth profile: A2DP 6.Output: TOSLINK Digital Optical Input & output 3.5mm AUX Input & Output 7.Input power: 5V DC, 500mA, A+ battery quality 8.Latency: ~ 40 milliseconds (ms) 9.have AUX input and output, have optical TOSLINK output and input Support HD both as a transmitter or Receiver Standard CD quality is 16bit.Using -HD wirelessly stream 24bit music quality for a "better-than-CD" listening experience. Colour: Black Material: plastic case Package Contents: 1x Transmitter Wireless Audio Receiver 1x 3.5mm AUX audio cable 1x 3.5mm RCA adapter 1x Audio cable 1x USB cable 1x Manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.