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 USB charger adapter with 2 ports plus one digital voltmeter.<br>Over-load and short circuit protection, reverse polarity protection.<br>USB charger adapter is designed with blue LED indicator light.<br>With waterproof sealing cap, good waterproof performance.<br>Fits for 12-24V motorcycle, auto, boat.<br>Comes with shell, screws and terminals, easy to install.<br><br><strong>Specifications:</strong><br>Color: Black<br>USB LED Light Color: Blue<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. 9.9 * 8.6 * 5cm / 3.9 * 3.4 * 1.9in<br>Item Weight: Approx. 99g / 3.5oz<br>Package Size: Approx. 22 * 15 * 5cm / 8.7 * 5.9 * 1.9in<br>Package Weight: Approx. 113g / 4.0oz<br><br><strong>Package List:</strong><br>1 * USB Cigarette Lighter Charger Adapter + Digital Voltmeter Set in Shell<br>1 * Pack of Screws and Terminals