Features: 100% brand new and high quality Hi-Fi Bluetooth receiver which has built-in rechargeable polymer battery, multi-functional buttons, easy and convenient to use. It is built with the most advanced Bluetooth chip 4.1 versions. Hi-Fi Bluetooth receiver can make your vehicle-mounted stereo speaker or home stereo speaker as a Bluetooth speaker. Built-in chip can enhance signal transmission circuit. Fast connection, long-distance connection, steady sound quality and no staccato The AEC echo cancellation circuit and ANC Noise elimination circuit of built-in chip keep the sound quality our and clear. Our HIFI Bluetooth Receive has function of automatically memory connection. Specifications: Color: Black Material: Plastic Bluetooth version: 4.1 Compatible with: Phone/tablet PC of Android system ,IOS system, and all Bluetooth audio devices ect. Transmission distance: 20M(open areas) Working current: 1828MA Battery standard: 300MA Charging: 3H Output connection mode: 3.5MM stereo audio port Size: 11cm x 6cm x 1.5cm Packing includes: 1 x Bluetooth receiver 1 x 3.5mm Audio connecting cable 1 x USB charging cable 1 x 1-to-2 AV cable