Features: brand new and high quality The product has dual USB super fast charging ports, supports 5V 3.4A/ 9V 2.5A / 12V 2A three output schemes, and can automatically identify the fast charging protocol supported by the output terminal access device The input voltage of the product is 12V-24V, which can be installed on vehicles, motorcycles and other vehicles, and the product has built-in power MOS, which can provide a maximum output power of 20W, and can automatically adjust the output voltage and current according to the recognized fast charging protocol. So as to adapt to the highest charging power of each mobile phone The product is made of aluminum alloy, which is durable and wears a waterproof and dustproof cover. The waterproof level reaches IP65. The cover can be waterproof, even if it rains, you don'for t have to worry about it. The product is equipped with an independent button switch, which can be used at one press and stop at one press, which is convenient and quick to operateThe product is equipped with a digital display voltmeter, which can monitor the voltage status in real for time to protect your car from harm The product uses a for smart temperature control chip, long-term charging is not hot, the terminals on the back are marked + positive and-negative, the positive is connected to the battery positive, the negative is connected to the battery negative, easy and quick installation Specifications: Material:Aluminum Alloy Size :Approx.3.7x5.2x2.8cm/1.45x2.04x1.1inches Style: Voltmeter Red/Voltmeter Red +60cm Line Monitorable voltage range: 6-30V There are multiple for protection functions: input over-voltage, under-voltage for protection; output over-current, over-voltage, under-voltage, and short-circuit for protection; reverse connection for protection; chip internal high-temperature for protection Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Car Charger