Fangrui Product Details 1. 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 . 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. 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