Features : 12-24V input voltage, widely used in 12V-24V Cars, RV, Caravans, Trailers, Buses, Boats, Yachts, Boats etc. Dual USB charger port for various charging needs, fast charging for iOS / Android mobile phone, GPS navigation, camera etc. Built-in voltmeter, can monitor the vehicle voltage in real time, more convenient and safe. Cigarette lighter socket with sealing cover, dustproof and waterproof. ABS / PC / PBT environmental protection and fireproof materials, can be used in the environment with temperature from -25 to 80 . Technical data: Material: ABSPCPBT Item Color: Black Light color: blue max . Power: 240W Input voltage: DC12V/24V Output voltage: 5V Output current: 3.1A Voltmeter measuring range: 6-30V Degree of protection : IP65 Certification: CE Size: 10.5 * 8.5cm / 4.1 * 3.3in Package weight: approx. 151g Mounting: universal Package List: 1 * Dual USB Car Voltmeter Switch 4 * screws