This is a multi-function MP3 player in the car, which is easy to install, convenient to operate, powerful, and has wiring protections function, making it safer in use. Features: When the power cord is connected in reverse, it automatically cuts off the power and protects the machine from burning. FM radio function, which can listen to real-time traffic conditions, financial reports, real-time information, musicbroadcasts, and lots of radio stations accompanying when driving, making driving more enjoyable. BT 5.1 wireless transmission, low power consumption, stable sound quality. Can answer and make calls and broadcast mobilephone navigation. External musicplayer can be connected through AUX cable. After shutting down, the clock will remain on and can be adjusted by long pressing the CLK and VOL buttons to set time. After parking and turning off the engine, when driving again, the player returns to its PreviousState. Specifications: FM: 87.5-108MHz Output: 45W*4 Working voltage: 12-14.4V Working temperature: -10 to 60℃ BT: 5.1 Install size: 178 * 50mm Panel size: 188 * 58mm Host depth: 55mm / 2.2in Remote battery: 2 * AAA battery (not included) Package size: 210 * 125 * 82mm / 8.3 * 4.9 * 3.2in Package weight: 360g / 12.7ounce Packing List: 1 * Host Machine 1 * User Manual 1 * Remote Controller 2 * Disassembly Keys 2 * Cable