Built-in Terrestrial Digital Full Seg Tuner: The built-in terrestrial digital full seg tuner automatically switches to 1 seg when the reception sensitivity is weak. (2 external inputs) AV1, AV2, video and audio input. AV2 is for camera, so when you switch the back gear and the back video will be prioritized. (Includes HDMI port and link to your smartphone) You can use the HDMI conversion cable to connect to your iPhone or Android smartphone and watch videos from your monitor while charging. [Color and Auto Dimmer Function] The color and contrast of the unit can be adjusted to the LCD screen. Built-in auto diama, automatically adjust the brightness of the screen by sensing the interior brightness of the car. Prevents glare at night. (2 Types of Power Wiring) Compatible with 12 V regular cars and 24 V trucks. Easily connect to the cigarette lighter power cable and internal wire via red and black wire.