Features: [BT Technology]: BT 4.0 version brings powerful sound and faster transfer speed. You can make hands-free call while driving, it makes driving safely.  [Fantastic Functions]: This product comes with its own horn and FM display, also Supports BT phone number function, voice prompt function. LED screen clearly shows the time.  [Playing music from multiple ways]: Supports MP3,WMA music format, and external TF card. Enjoy music in different ways.  [Long Standby Time]: After charging for two hours, it can be used continuously for up to 8 hours, and long standby time is 20 hours. Do not worry power off.  [Sun Visor Design]: Specially designed splint that clips the product to the car sun visor, saving space and easy to operate.   Note: It supports TF Card reading up to 64GB.   Specifications: BT Version: BT4.0+EDR;  BT Microphone Effective Distance: 0.5-2m;  BT Transimission Distance: 10m;  FM Frequency: 87.5-108MHz;  Working Voltage: 12-24V;  Charging Voltage: DC5V;  Music Format: MP3, WMA;  Charge Time: 2 hours;  Built-in Battery Capacity: 1000mAh;  Built-in Loudspeaker Output: 8Ω2W;  Color: Black;  Main Item Size: 115*60*30mm/4.52*2.36*1.18in;  Main Item Weight: 107.5g/3.79oz;  Package Size: 138*128*60mm/5.43*5.03*2.36in;  Package Weight: 274g/9.66oz;   Package List: 1* BT MP3 Player;  1* Charging Cable;  1* Car Charger;  2* Black Clips;  1* Manual