Applications: Can be used to power most car accessories such as mobile phones, tablets, navigation, and GPS. Usage: can be used on DC12V, motorcycles, ATVs, SUVs, boats, and other means of transport. Features: There are a number of protection functions: input overvoltage, undervoltage protection; output overcurrent, overvoltage, undervoltage, short circuit protection; reverse connection protection; internal high-temperature protection for the chip. Advantages: The USB output voltage has three output schemes: 5V3.4A /9V2.5A/12V2A. The agreement includes: DCP BC1.2, for Divider3/ 1.2V, Qualcomm QC2.0/QC3.0, SCP, , , Spreadtrum SFCP and other fast charging agreements, which can support 's super fast charging. Name: Dual USB Super Fast Charger QC3.0 + Voltmeter + Switch Input voltage: DC12V Installation: handlebar installation, screw fastening Voltmeter color: red Monitorable voltage range: 6-30V Output voltage: 5V3.4A/9V2.5A /12V2A color: Black Material: ABS Package contents: 1 x Motorcycle charger 1 set x Mounting accessories only the above package content, others 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 allowed measurement error is +/- 1-3 cm.