12-24V Motorcycle Car Triple USB Charger Power Outlet Socket Adapter Volt Meterr

Feature:Three in one mini design, USB mini car charger, voltmeter.Three Car Charger can be use at the same time or use individually.Short charging time, non-interference.Universal USB port works with most USB cables.Three high-brightness LED digital display for easy viewing.Constantly monitor, ensure the battery used under normal operating voltage.Plug USB devices such as Mobile Devices,Tablets, Mp3 Players and so on.Plugs into any car power outlet.Specification: Material PP Input DC12-24V Output 3.1A 5 V Operating temperature 80 (?) Voltage measurement error