[ON/OFF Switch] This 12v usb outlet features a switch met the customer need which can save power and prevent the battery being drained when leave unused.[Dual QC3.0 USB Ports] Provides 4x faster charging speed to compatible devices. Backwards compatible with Quick Charge 2.0 & 1.0, delivers the fastest possible charge to all non-quick charge device.[Wide Application] Fits for 12V/24V car, boat, marine, motorcycle, ATV, RV etc.[All-round Protection] With over-load, over-current and short circuit protection to ensure charging safety, this usb car charger guard the safety of your devices.SpecificationsInput Voltage: DC 12V-24VOutput Voltage: DC 3.6-6.5V/3A, 6.5V-9V/2A, 9V-12V/1.5AProduct Dimension: 1.45 x 1.92 inchesPortiforium Dimension: 1.13 inchesMax Output: 36W(18W each)Colour:BlackLED Voltmeter Color: BlueMaterial:ABSPackage Contents:2 * Dual USB QC3.0 Car Charger2 * 23.7 Inches Wire with 10A fusesNotes1. The voltage will display by connecting to the battery.2. Since the series does not support fast charging, charging the is normal speed.3. For mobile phones that support fast charging, you must use the charging cable or fast charging cable to achieve fast charging.4. For vehicles, it's recommanded to get power from fuse box, while for the motorcycle, better connect to the wires of the key switch.Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.