Happytech 3.5mm Jack Bluetooth V4.1 Hands Free Music Audio Receiver Adapter AUX Kit Compatible with All Android and iOS Devices {Assorted Colour} Enjoy Wireless Music Anytime, Say Goodbye to Wired Device Worry less about wires and stream your audio entertainment from your Bluetooth-enabled device with perfect sound quality One Key Control, Easy to Use Turn on, Connect Bluetooth devices, receive mobile or other Bluetooth device's audio signal with one press Support Bluetooth V4.1 Bluetooth 4.21 technology ensures a faster data transmission rate and much more stable connection between a Bluetooth device and the Audio Receiver. The Bluetooth range up to 10 meters. Superior Acoustics, Crisp Clear Sound The Bluetooth audio receiver provides high signal to noise ratio and low distortion signal, good transient response, and high audio quality Built-in Battery, Plug and Play Built-in rechargeable lithium battery, provides up to 4 hours' working time, plug and play, and only takes 50 minutes to fully charge it. Dual-link Connection.