MEIRIYFA Motorcycle Dual USB Charger is 9V-12V USB wall outlet compatible with various digital devices, intelligently matching kinds of cell phones, car recorders, tablets, cameras, etc. Designed with Dual QC3.0 fast charging, the motorcycle charger adapter charges your mobile device at the maximum charging speed supported by the device. Built-in smart identification chip to intelligently match the current required by your device for safe and fast charging. Two color wires, so you can better distinguish between positive and negative, red to positive, black to negative. How to Install: 1. Handlebar Installation: Fix the USB charger on the handlebar or the seat pole of the multifunctional rearview mirror, and connect the positive and negative poles of the wire to the power supply. 2. Rearview Mirror Screw Mounting: It can be directly fixed to the screw hole of the rearview mirror base, and connect the positive and negative poles of the wire to the power supply. Product Features: With Dual USB Port, QC3.0 fast charging with capacity. One USB Port for 5V 2.1A, the other for 5V 1A With an on/off switch. Red wire connects to the positive terminal, black wire connects to the negative terminal . With waterproof cover design, dustproof and waterproof. Flame retardant, high temperature resistant, corrosion resistant. Package Includes: 1* Motorcycle Dual USB Charger. 1* handlebar fixing bracket. 1* Rearview mirror fixing bracket. 1* screw. 1* screw nut.