This set consists of one USB charger adapter and one digital voltmeter. The voltmeter can check the voltage and display clearly in red LED. The USB charger adapter provides dual USB ports for charging the mobile phone， GPS， camera， MP3 or other electronic products.<br><br><strong>Features:</strong><br>One digital voltmeter plus two USB ports.<br>Over-load and short circuit protection， reverse polarity protection.<br>With waterproof sealing cap， good waterproof performance.<br>USB charger adapter is designed with blue LED indicator light.<br>Fits for 12-24V motorcycle， auto， boat.<br>Comes with mounting panel， screws and terminals， easy to install.<br><br><strong>Specifications:</strong><br>Color: Black<br>USB LED Light Color: Blue<br>USB Input Voltage: DC 12-24V<br>USB Output Voltage: DC 5V<br>USB Output Current: 1A/2.1A<br>Voltmeter Measureing Range: 6V-30V<br>Voltmeter Display: Red LED Digital Display<br>Material: ABS<br>Item Size: Approx. 10.5 * 5.3 * 4.4cm / 4.1 * 2.1 * 1.7in<br>Item Weight: Approx. 60g / 2.1oz<br>Package Size: Approx. 22 * 15 * 4.5cm / 8.7 * 5.9 * 1.8in<br>Package Weight: Approx. 75g / 2.6oz<br><br><strong>Package List:</strong><br>1 * USB Cigarette Lighter Charger Adapter + Digital Voltmeter Set with Cap Mounting Panel<br>1 * Pack of Screws and Terminals