(DUAL CHARGING) This high-quality built-in power outlet has two 5V / 2.1A charging ports and built-in smart chip that automatically detects your devices and is able to charge them at the same time at optimal speed Note: The USB power outlet consumes 30 mA when idle Electricity, you do not have to worry about it (Easy installation) Installation is very easy within 20 minutes: " + " is plugged into positive pole and " - " is put on negative pole. Also, it can be connected to an on / off switch so you can save energy. Attention: The integrated LED display works when you turn it on (LED VOLTAGE INDICATOR) An integrated voltage protection with a LED digital display shows you the exact voltage condition of your battery at any time. Very useful for car, boat, bike, SUV, ATV, RV car, campers and motorcycles. It is compatible with most vehicles with a voltage of DC 12-24V connections (HIGHEST SAFETY) Our product is subject to the strictest safety and quality regulations and to ensure protection against overload, over-voltage, overcurrent, overheating and short-circuit, and to provide maximum safety during use (RELIABLE DURABILITY) Made of fireproof and waterproof material with IP66 certification. The permanently mounted protective cap above the USB interface also indicates the current voltage values and effectively protects the charger against sudden water splashes. Color: Black Material: ABS Package Contents: 2 * Dual USB Car Charger 4 * Blue Terminal Only the above package content, other products are not included. Note: Light 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.