Extra-Long Play Time Built-in battery provides up to 8 hours play time, 168 hours standby time, only takes 1.5 hours to fully charge it.Premium Chip supply more stable and faster transmission with less power consumption, which can represent a superior audio performance to spoil your ear and never feeling boring while driving.What You Get 1 Pack Bluetooth Receiver Cassette adapter. Product manual and customer service card. 12 Months Replacement if there is any dissatisfaction with our Bluetooth Receiver Cassette Adapter, please contact us firstly. Premium Sound Quality for Music The Cassette Bluetooth receiver is compatible with most smartphones and is ideal for home or car audio systems. This is a box-type Bluetooth receiver for cars or devices that don't have Bluetooth and want to receive Bluetooth signals.Just adjust the audio equalization settings on the player and you'll get the music classics!Why do you need me? When you have a vintage car with a tape player, the cassette Bluetooth receiver will let you continue to enjoy the music on your phone! You don't need to replace or refit your car to avoid destroying his original classic!Strong Compatibility No phone call function but support any phones, tablets, car stereo, or other devices equipped with standard Bluetooth tech. Seamlessly transmits stereo audio for high quality sound, making you enjoy your music anywhere and anytime!