Motorcycle 3.1A USB Charger & Voltmeter - Blue LED

Universal fits for 12V Vehicle, Motorcycle, ATV, Boat, Car, Marine, UTV, Camper, Caravans, Travel Trailer, etc. 
Suitable for charging GPS, IPhone, IPod, Mobile Phones and other digital devices 

Power Input: DC 12V-24V 
Power Output: DC 5V 1A / DC 5V 2.1A

Cable Length: 21.6inch (55cm) 
Display: segment LED digital tube

Fast Charge with stable output current. 
With protection of overcharge, over-discharge, overcurrent and short circuit.

Monitors the state of your battery between full charged and discharged.
Can indicate a poor or bad charging system. 
The meter has easy to read LED segments and connect to your 12 volt system. 

Installation: 
The power cable are with 6.3mm connectors, you can change the power lines yourself. 
If the connector plug is not suitable, you can remove the plug and connect to the circuit directly. 
Red wire is positive, black wire is negative. 
Connect the red wire to the ACC terminal on car or ignition lock "ON" terminal on motorcycle. Connect the black wire to the ground terminal. 
Or connect it directly to the battery on your motorcycle.