Dual Usb Charger 2.1a & 2.1a with Digital Voltmeter Green Led Light

Can be widely used for ipad and mobile phone, navigation, driving recorder charging, etc.Car modification USB charging, 12V-24V incoming line, two USB ports out, one 1A, one 2.1A.Input: 12-24V DC.Output: Maximum 3A 5V DC/2 USB ports, dual USB ports for mobile phones, MP3s, etc.There is a point + - at the bottom of the product. Please look clearly when wiring. Do not reverse the connection. If the product is reversed, it will burn out.Features:1. Strong performance, equipped with smart chip field, high output voltage and current accuracy, fast response speed, intelligent identification, more stable and safe.2. Apply to all mobile phone brands, tablets, car recorders, electronic dog, GPS and other electronic equipments, eliminate the critical moment of power embarrassment.3. Apply for small cars, off-road vehicles and small trucks (not more than 24V), yachts, motorcycles, ships. (Most of the trucks, excavators, trucks, battery voltage is actually more than 48V, so do not recommended to use in this type of cars)Make sure your car is 12-24V voltageNote: This product is not lighter, can not light the cigarette. Can not exchange positive and negative poles, so as not to burn your electronic productsUSB interface: 2 x USB 2.0 interfaceOutput current: 3.1A (2.1A + 2.1A)Voltage detection range: 6-28vProduct size: 5.5 x 3.6cmSpecifications:Colour: BlackMaterial: Nylonlight Color: greenPower supply: 12V DCWorking current: 3 AWaterproof function: Yes (life waterproof)Mounting hole diameter: 2.9cm, wide nut fixingWiring leg width: 6.3MM (send terminal)Packing include:2 x Car USB mobile phone charger voltmete2 x 60CM cable2 x blue connection capOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.