12V-24V QC 30 Dual USB Car Cigarette Lighter Charger Waterproof With LED Streamer Voltmeter ON/OFF Switch Suitable For Boat Car 12V-24V QC 3.0 Dual USB Car Cigarette Lighter Charger Waterproof With LED Streamer Voltmeter ON/OFF Switch Suitable For Boat Car Instructions: 1.Press the button to turn on the power, wait for 2s, the real time voltage will be displayed. 2.Press the button once again to change to the red power indicator mode. Both display modes can be freely switched by the button, 3.Press switch for 2s to turn off device. Descriptive Features: 1: This is the QC3.0 intelligent fast charger, with voltage display, high voltage warning, it can display the charging rate, there is a switch to freely switch the display mode and turn on/off the power. 2: Lightly press the switch to turn on the power, the real-time voltage can be displayed after the full screen is on for 2 seconds, and then press the button again to switch to the red power indicator. The two display modes can be switched freely through the button. Press and hold the switch for two seconds to power off the device. After the power is turned off, it means that the device has cut off the power input, achieving the effect of power saving. 3: When the input voltage exceeds 14.6V, the red indicator light is on (warning function, indicating that the input voltage is too high) 4: When the power is turned on and USB charging is performed, the flow of the color screen indicates that it is charging; the flow of the color screen reflects the charging speed. When the phone is fully charged, it will light up on the full screen. After two minutes, it will display the real-time voltage again. Tap the switch to switch the display mode to a separate red indicator light. Press and hold the switch for two seconds to power off the device. 5. Multi-function: power supply for mobile phones, tablet computers, GPS and other USB devices, widely used: cars, motorcycles, ATVs, off-road vehicles, UTV, boats, etc. note: 1. The picture is for reference only. The actual product shall prevail. 2. Your satisfaction is our biggest concern. Before leaving any neutral or negative feedback, please contact us to better resolve any issues. 3. Due to manual measurement, please allow an error of 0-1cm. Make sure you dont mind before bidding. 4. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! thank you very much! The package includes: 1 X QC 3.0 car dual USB charger with LED voltmeter ON OFF switch _x000D_ _x000D_