Product features: a variety of protection functions: input overvoltage, undervoltage protection; Output overcurrent, overvoltage, undervoltage, short circuit protection; Reverse connection protection; High temperature protection inside the chip. Product advantage: USB output voltage has 5v3.4a / 9v2.5a /12V2A three output schemes. The agreement includes 2. Quick charge: Divider3 DCP BC1.2, apple/samsung 1.2 V, qualcomm QC2.0 QC3.0, huawei SCP, FCP, samsung AFC, spreadtrum SFCP quick charge agreements, such as can support huawei super quick charge. Specifications: Product name: square double USB super fast charger + (red and blue) voltmeter product model: cs-854a1 / cs-854a2 input voltage: DC12V gross weight: 115G Net weight: 112G packing: PE bag Package size: length 14CM, width 3.4cm and height 15.2cm Mounting method: handlebar mounting and screw fixing Product color: black Voltmeter color: red/blue Monitoring voltage range: 6-30v Output voltage: 5v3.4a / 9v2.5a /12V2A accessories: handlebar mounting bracket *1, screw mounting bracket *1, large screw *2, small screw *1, handlebar fixing screw *1, anti-skid gasket *1; Application: it can be used to power most vehicle supplies such as mobile phone, tablet, IPAD, navigation and GPS Package Included: Handlebar mounting bracket * 1, screw mounting bracket * 1, big screw * 2, small screw * 1, handlebar fixing screw * 1, anti-skid gasket * 1; extension line * 1