Features: 100% brand new and high quality Hi-Fi Bluetooth receiver with built-in rechargeable polymer battery, multi-function buttons, simple and convenient to use. It is built with the most advanced Bluetooth chipset version 4.1. Hi-Fi Bluetooth receiver can turn your car stereo speaker or home stereo speaker into a Bluetooth speaker. Built-in chip can improve the signal transmission system. Fast connection, long-distance connection, stable sound quality, and no stuttering. AEC echo cancellation circuit and ANC noise reduction circuit in the built-in chip keep the sound quality pure and clear. Our HIFI Bluetooth receiver has the automatic memory connection function. Specifications: Color: Black Material: Plastic Bluetooth Version: 4.1 Compatible with: Phones/tablets with Android system, IOS system, and all Bluetooth audio devices, etc. Transmission Distance: 20M (open areas) Working Current: 18-28MA Battery Standard: 300MA Charging: 3H Output Connection Mode: 3.5mm stereo audio port Size: 11 cm x 6 cm x 1.5 cm Package includes: 1 x Bluetooth Receiver 1 x 3.5mm Audio Connection Cable 1 x USB Charging Cable 1 x 1-to-2 AV Cable