1、When the power cord is connected in reverse, it automatically cuts off the power and protects the machine from burning. 2、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. 3、BT 5.1 wireless transmission, low power consumption, stable sound quality. Can answer and make calls and broadcast mobilephone navigation. 4、External musicplayer can be connected through AUX cable. 5、After shutting down, the clock will remain on and can be adjusted by long pressing the CLK and VOL buttons to set time. 6、After parking and turning off the engine, when driving again, the player returns to its PreviousState. Item Type: Car BT MP3 Player Main Color: Black FM: 87.5-108MHz Output: 4 x 45W Working Voltage: 12-14.4V Working Temperature: -10 to 60℃ BT: 5.1 Install Size: Approx. 178 x 50mm / 7.01 x 1.97in Panel Size: Approx. 188 x 58mm / 7.4 x 2.28in Host Depth: Approx. 55mm / 2.17in Remote Battery: 2 x AAA battery (not included) Package Size: Approx. 210 x 125 x 82mm / 8.27 x 4.92 x 3.23in Package Weight: 360 g / 12.7 oz(approx.) 1 x Host Machine 1 x User Manual 1 x Remote Controller 2 x Disassembly Keys 2 x Cable