Features: 6-in-1 marine switch panel–This 12V socket panel is designed with 3 12V cigarette-lighter sockets+12V rv USB sockets+LED digital display voltmeter+LED rocker switch. Easy to install and operate. It can also be disassembled to replace other charger sockets or any other accessories. 3-socket cigarette-lighter adapter distributor-three cigarette-lighter sockets have been expanded, which is enough to use various portable devices in the vehicle at the same-time. Waterproof dual USB charger socket-This 12V USB charger socket is built with dual USB charging ports, and the two ports output: 5V/2.1A&2.1A (4.2A in total), which will automatically detect your equipment and charge two devices at the best speed! Real-time LED voltmeter-With a large digital voltmeter to display the voltage of 5-48V, you can monitor the battery-condition of a car or ship if your voltage is in a normal state. Long service life and overcharge protection-rocker switch design, easy to use. Life is as long as 10000 cycles. Overheating, overcurrent and overcharge protection to ensure the safety of charging. Specifications: Material:ABS Size:Approx.15x10.5x6cm/5.9x4.13x2.36inch Color: Black Product weight: 246g Accessories: 4 screws and 13 blue terminals. Input voltage: 12-24V Output voltage: 5V4.2A. Measuring range of voltmeter >: 6-33V Product material: ABS, aluminum plate Input voltage of cigarette-lighter: 12V 20A,24V 10A. Wiring method: The back of the charging stand is marked with "+"and "-",which can be connected to the positive and negative poles of the power supply. Scope of installation: the product is suitable for all car, caravans, yachts, ships with 12-24v voltage. Engineering vehicles can be installed and used. Package Includes: 1x Sockets Toggle Switch note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.