GZLMMY USB Charger 4.2A Dual Ports with LED Digital Display Voltmeter 12-24V Universal for Car Boat Motorcycle -Red-

Real Time Monitoring Voltmeter Combined dual USB interfaces and LED digital display voltmeter into a combo. With built-in intelligent voltage monitor, 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 Measurable voltage: 6-38V Interface: dual USB ports Material: Environmentally friendly anti-flame retardant nylon material Voltmeter Dimension: 2.16" x 1.47" x 1.06" Operating Temperature: -20 to 80? 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. Installation method: Please use the hole opener first, open a hole, and then tighten with the threaded ring. Package List: 1 x Dual USB Voltmeter