Feature: 1. [Multi-function] With this cassette adapter, you can answer calls or control music on the receiver, change volume, play, pause, skip music, and have long playback time. 2. [Compatible] The cassette adapter supports all mobile phones, tablets, MP3 players, car stereos, headsets or other devices equipped with standard Bluetooth technology. 3. [Stereo] Smart design creates a secure connection, double shielding, polished metal and corrosion-resistant gold-plated contacts, Hi-Fi, seamless stereo audio transmission. 4. [Good Performance] Every small component of the cassette aux receiver has been tested thousands of times, intelligent noise reduction, ensuring reliable performance and minimal signal loss. 5. [Easy to Use] This cassette adapter allows you to continue enjoying the music on your phone without changing or modifying your car, it is simple without cables, with stable and fast transmission. Specification: Product Type: Cassette Adapter Material: ABS Tape Size: Approx. 10 x 6.4 x 1 cm / 3.9 x 2.5 x 0.4 inches Color: Black Battery: Lithium battery Capacity: 300 mAh Bluetooth: 5.0 Parameter: Supports all mobile phones, tablets, car speakers or other devices equipped with standard Bluetooth technology Perfect for home or car speaker systems Hi-Fi sound, long playback time, stable and fast transmission, no cable, simple. Package List: 1 x Cassette Adapter 1 x USB Power Cable Note: Manual measurement, please allow an error of 0.4-0.7 inches.