Product size: 210 x 50 x 107mm Product input voltage: 12-24V Dual USB car charger with dust cover USB indicator: Blu-ray Input: DC 12-24V Output: 5V 4.8A (2.4A+2.4A) 4-hole panel size: about 0.52mm x 175mm (2.05x6.89 inches) Power female seat with dust cover Input voltage: DC12-24V Output rated power: 12V 15A 24V 10A Voltmeter measuring range: DC 2.5-30V Voltmeter LED backlight: blue The DC voltmeter monitors the voltage of the battery in real time, and can judge whether the battery is charging according to the voltage. Connection : red wire connected to the positive pole of the power supply (12-24V+) black wire connected to the negative pole Installation : Open the hole to install about 172*40mm, then put it into the product, and fix it with screws Colour:black Material:ABS Package Contents: 1 * Multi-function panel 4 * Mounting screw Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.