12V/24V USB Outlet with LED Voltmeter and Waterproof Dual USB Power Socket for Car Boat Cigarette Lighter Socket with Quick Charge 3.0 Marine RV FASTER CHARGING: You can charge two compatible devices simultaneously at QC3.0 speed from 0 to 80% in 35 minutes with the QC 3.0 12V/24V USB socket. METAL MATERIAL: Unlike other plastic material, this 12v power socket is stronger, has greater tensile strength and more durable due to the metal material. Digital LED Voltmeter: Easier for you to know the battery status with the LED digital display and brighter blue lights. Anti-slip Button Switch: More stable on control than the touch button, allows you to turn off the 12V cigarette lighter socket to save energy and prevent the battery when not in use. Safe to Use: CE and ROHS certified with overheating, overloading and short circuit. protection to ensure charging safety with depvko lifetime technical support and 5-year replacement.