Features: brand new and high quality Wireless Listening: Transmit Your Perfect Audio entertainment wirelessly from your smartphone or tablet, and listen to music with perfect sound quality via this wireless Bluetooth-compatible Receiver. Easy Pairing: one-click power-back, pair your smartphone or tablet with an audio adapter (receive mode only). Easy to connect: For most speakers, simply connect the adapter to a hi-fi speaker, speaker or headset through a standard RCA/AV or 3.5 mm socket, and connect two speakers to for play music. Light and Portable: Made of Bluetooth-compatible 3.0 chip, strong and light aluminum alloy, with USB power supply wire, need external 5V power supply. Excellent Sound Effects: Bluetooth-compatible 3.0 chip module, wireless transmission of high-quality sound with no delay from your traditional speakers, support for up to 5m/10m Bluetooth-compatible Connection Range, remote control of music playback, no-compromise on sound, latest Acoustic Isolation Technology for BT adapters, and advanced laboratory tuning, provides first-class audio quality. Specifications: Product name: Bluetooth-compatible receiver Product color: black , white(optional) Material: ABS Bluetooth-compatible vesion: 3.0 Charging port: USB Receiving distance: ≤10 meters Interface: RCA 3.5 Transmission rate: 5 (Mbps) Working frequency: 2.4 (MHz) Package Includes: 1PC x Bluetooth-compatible Adapter note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!