Dual Usb Rocker Switch Led Digital Voltmeter for Fast Charging

Product features: flame-retardant materials are odorless and durableInstallation: Please use a hole opener to open the hole, put the product in, and then unscrew the screw fixing ringApplication: input 12 - 24 V output 5 V / 4.2 A fast charging mobile phones, tablets, GPS and other devices. Universally applicable to all 12 V-24 V cars, buses, testers, boats, utv, atv, etc.Protection: with overcharge protection function, when the device battery is fully charged, it can automatically stop charging, overheat protection, overvoltage protection.colour:BlackMaterial:nylonPackage Contents:1 x Dual USB Car Charger Adapter2 x terminalsOnly 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.