Features1WIDELY APPLICABLE: The product is equipped with QC3.0A charging port, which can be used for powering mobile phones, tablets, GPS, etc. 2DIGITAL DISPLAY VOLTAGE: The product is equipped with a voltmeter, which can detect the use status of the battery at any time and prevent safety accidents caused by bad batteries 3WITH SWITCH: Independent switch can control USB and voltmeter at the same time, and can be turned on immediately 4SAFE MATERIAL: Aluminum alloy material with heat resistance, corrosion resistance, flame retardant, high safety factor 5WITH FITTINGS: Equipped with patches and hex wrench, easy for you to install, complete accessories guarantees convenient operationSpecificationItem Type: Motorcycle USB ChargerProduct Material: Aluminum alloy and ABSInput Voltage: DC12VInstallation Hole Diameter: Installation and use within approx. 2.2cm / 0.9in in diameterPackage List1 x Charger1 x User Manual2 x Patch1 x Hex Wrench