1. Unique appearance design, sophisticated products and high quality. 2. Super long battery life and playback time. 3. Last number callback function. 4. Volume memory function. 5. Multi-functional for sports, car and home audio and video use. Colorful LED ambient light. You can switch Bluetooth/FT card to at will. Built-in microphone, answer/reject/hang up/redial calls with one click. Supports one to two, you can connect two mobile phones at the same time. Input voltage: DC5V Battery capacity: 250mAH Bluetooth version: V5.3 Working distance: 10 meters Audio interface: 3.5MM audio jack Charging interface: TYPE-C TF card slot: 1 (insert TF card to ) Battery life: about 14H Charging time: about 2H Signal-to-noise ratio: 60DB Distortion:Less than 0.1% Frequency response rate:20HZ-15KHZ Left and right channel separation: 60DB Microphone effective distance: 0-1M Colour: Black Material: abs Package Contents: 1 x Car Bluetooth receiver 1 x Data cable 1 x Metal plug Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.