5V2.1A Car LED Socket Voltage Digital USB Charger Voltmeter

single USB with LED voltage display for car, boat, marine, bus and etc.
Material: Waterproof and Heat Resistant;With IP68 waterproof grade, made of high and low temperature resistant nylon flame retardant materials, high or low temperature-resistant. INTELLIGENT CHARGING: 2.1A USB Car Charger -- USB charging ports with single output of 2.1A enables charging devices at high speed. NOTE:A. The built-in LED Disaply will work when you power it. B.The car charger will consume 30mA current at most when it is idle. C.Please provides the marine usb outlet with 2.8A current.Otherwise, it can't offer you enough current when charge your phone. OVERCHARGE PROTECTION: The cable has a 10A built-in fuse for over-load protection, the USB socket meets CE/ROHS certification, charges safely, without risk of overheating or damaging devices Safety Driving: With built-in LED digital display voltage monitor, shows the accurate voltage status of device in real-time, prevent your devices from starting hard, off and on intermittently and the headlights not enough bright cause by too low battery voltage, or prevent your devices from engine instability or horns stopping working cause Wide Compatibility: This USB socket fits for almost input DC 12V-24V car, Boat, Marine, ATV, RV etc. Suitable for charging mobile phones, GPS, digital cameras, PDAs and other USB accessories Specifications:
Power Input: DC 12V-24V
USB Output Voltage: 5V
Output Current: 2.1A
MAX Power: 10W
Product Dimension: 5.4cm x 3.7cm (2.12in x 1.46in)
Portiforium Dimension: 2.9cm (1.14in)
Package:
1 x Car Charger
2 x Blue Connector Cap
1* 23.7 Inches Wire with 10A fuse(optional)
1* single hole install panel(optional)
NOTE:
1.The voltage reading will be visible only by connecting to the battery
2.The voltage also can be read when the cover is engaged
3.This USB charger socket does not support Qualcomm quick charge