Waterproof LED illuminated USB charging port and voltmeter. Suitable for all flat interior and exterior use. 4.2A dual USB power charger, ideal for charging your mobile phone, tablet, Android devices, PDA, GPS etc. Dynamic LED voltmeter helps monitor the storage battery voltage, LED will alert flash when the voltage is out of the safety area. Universal Compatible with 12V-24V Motorcycle Car, Boat, ATV, UTV, Camper, Caravan, Caravan, etc. Product Dimension: 15 cm x 4.3 cm x 5.6 cm (5.9 inches x 1.69 inches x 2.17 inches), Portiforium Dimension: 7.2 cm x 2.9 cm (4.65 inches x 1.14). This waterproof triple panel can be used for interior and exterior use. Can be installed vertically, horizontally or under the dashboard or a flat surface. 4.2 A dual USB charger Optimized for iPad, iPhone & iPod - fast charging at full speed. Widely used with electrical equipment for power supply: vehicle, GPS, mobile phone, camera, mp3. 2 port USB socket charger: This is a high quality USB charger Very reliable range of 12V-24V sockets/outlets Waterproof design and very robust construction The flush socket has a dust proof and is suitable for charging GPS, iPhone, iPod, PSP, mobile phones and other digital devices. Material: ABS high temperature resistant nylon, flame retardant. Power consumption: DC 12 V-24 V. Maximum power: 22 W USB socket I power output: DC 5 V 2.1 A. USB socket II power output: DC 5 V 2.1 A. DC Voltmeter: This is a high quality voltmeter to check the condition of your battery and charger. Fully charged and discharged between the state of your battery. 15V voltage range 11.3V-11.9 V red LED indicates the battery should be changed, 12.0V-12.5V yellow LED indicate normal when the car engine is turned off, 12.6V-15V green LED indicates normal when the engine is turned on. The high-quality flame retardant materials, waterproof IP65, CE and RoHS, completely environmentally friendly. Power consumption: DC 12 V-24 V Voltage Range: 5-15V Protection: Reverse Connection Protection Cigarette lighter socket: Operating voltage: DC 12 V Can be used to light cigarettes: no