Universal LED Digital Display Voltmeter with 5V 4.2A 2 Port USB Charger, Ampper Voltmeter and Dual USB Charger for 12-24V Car Boat Marine ATV UTV Switch Panel (Green)

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About Universal LED Digital Display Voltmeter With 5V

Ampper 5V 4.2A dual USB charger with LED digital display voltmeter for 12-24V car boat marine ATV UTV switch panel. Features: 1, Power input: DC 12V-24V 2, Power output: 5V 2.1A/2.1A 3, Material: ABS & durable rubber 4, Could be installed in 12-24V vehicle: car boat marine ATV UTV, etc. 5, Can be used for GPS, cell phone and MP3 etc. 6, Waterproof cover for Dual USB port Benefits: 1, Dual USB install on car boat marine ATV UTV for GPS, cell phone and MP3 etc. 2, Voltmeter to test the voltage of your vehicle battery. 3, Universal fits with the adjustable mounting O ring. 4, Most of the phones, GPS, Apple iPod, or any other device charged by USB power 2.1A. 5, Over-heated, over-current, over-charging protection, charging will be automatically stop when battery is full. Kindly pls note: 1, You could connect the item to your vehicle directly. 2, The "+" is to positive, and "-" to negative/ground. 3, You could connect the red wire to the battery or ignition lock "ON" terminal on car (the item power will controlled by the key with 2th method). Package: 1 x Dual USB charger with voltmeter. 1 x Adjustable O ring for mounting. 2 x Blue terminal 100% Satisfaction Guarantee. No reason for return or change. Hassle free 1 years warranty. Order it now!