Item Name: 3.4A Motorcyle Charger Dual USB Cigarette Lighter Voltmeter Display Waterproof. Product DescriptionDescription:Product Name: Motorcycle double USB + voltmeter redProduct model: cs-1072a1Net weight: 91gProduct color: BlackVoltmeter color: RedProduct material: silica gel + ABS plasticInput voltage: 10-24 VOutput parameter: 5V / 3.4AProduct interface: Dual Port USBMonitoring range of voltmeter: 9-30vProduct line length: 140cmFixing method: faucet handle fixing (diameter: 2.2cm), rearview mirror base fixing (diameter: 0.97cm)Applicable models: Motorcycle / ATV / motorcycle tricycleProduct accessories: faucet bracket * 1, rearview mirror fixing bracket * 1, antiskid gasket * 1, long screw * 1, small screw * 2, fixing nut * 1Wiring instructions: the red wire of the product is connected to the positive pole of the battery, and the black wire of the product is connected to the negative pole of the battery-Application: it can supply power to mobile phone, tablet, GPS and other electronic devices at the same time voltmeter can detect battery voltage at any time[Product advantages]:1 The product is designed with 3.4A super current, which can supply power for mobile phone, tablet, navigation, GPS and other devices2 The product is equipped with waterproof and dustproof cover, which can effectively play a good role in protection and is safer in use3 Products with two kinds of installation (tap installation, fixed installation of rear-view mirror), simple and convenient, and products with independent switch, that is to open, do not need to close, very safe and energy-saving4 The product comes with a voltmeter, which can detect the battery voltage at any time to prevent the potential safety hazard caused by the bad battery5 The product is equipped with 140cm power cord, which can fully meet the installation requirements. It can be directly installed on the battery to reduce the installation difficulty.