Real Time Monitoring Voltmeter Combined dual USB interfaces and LED digital display voltmeter into a combo. With built-in intelligent voltage monitor, MITUNING 2-in-1 voltmeter is able to show you an accurate voltage value at anytime while you're driving, helping you to easily notice the battery running condition. 2 USB Fast Charging - Wide Application Adopted high tech of 2.1A USB fast charging port, it's able to auto select the needed current to charge your mobile devices. Perfect for most brands of Smartphones (iPhone/Samsung/Sony/HTC/Huawei/LG/XIAOMI...), Tablets, GPS, MP3/MP4/PSP, digital camera and other USB-devices. Wide Operating Voltage Range It is specially designed to steadily work at the operating range of 12-24 volt, while its transient voltage is tested up to 38V, suitable for most SUV, ATV, UTV, Scooter, Snowmobile, Street Bike, Car, boat, Marine, camper, etc. Specification: Rating Voltage: 12-24V USB Output: 5V / 4.2A Interface: dual USB ports Material: Copper + ABS Plastic Voltmeter Dimension: 2.1" x 1.4" x 1" Bracket Dimension: 2.4" x 1.7" Operating Temperature: -40 to 70? Wide Application: cars, motorcycles, ATVs, SUVs, UTVs, Boats, etc Multi-purposes: supply power for cellphone, tablet, GPS and other USB-devices Kindly Reminder: 1. The "+" is to positive, and "-" to negative. 2. For vehicles, it's recommanded to get power from fuse box, while for the motorcycle, better connect to the wires of the key switch. 3. The voltage meter reading led will show up after the item is connected to the battery. Package List: 1 x Dual USB Voltmeter 1 x Mounting Panel 2 x Wiring Connectors 2 x Screws See more

Free-mounting panel for you to mount it depending on your preference, simple fast setup in about 20 minutes, fits most SUV, ATV, RV car, boat, motorcycle and other 12-24V vehicles. fireproof ABS material with IP66 waterproof rating, the tight fitted cap over the USB interface displays the voltage readings as well as effectively protects the charger against sudden splashes. Certified by CE & RoHS with overload, over-current and short circuit protection to ensure charging safety. Dual USB interface design with single output of 21A (Max total output of 42A), it quickly charges for most smartphones, tablets, GPS, digital camera, PSP/MP3/MP4 and other usb-devices. [Easy notice voltage status] - built in intelligent voltage monitor, with LED digital display, it real time shows you the accurate voltage status of car or motorcycle, more secure for driving.