[ALUMINUM DUAL QC3.0 USB PORTS] Up to 4x faster than conventional chargers, Dual USB charger socket has two 18W / 3A QC3.0 fast charging ports. Bulit in Smart IC technology, 2-Port USB charging ports chargers 2 devices at speed simultaneously. The USB car charger is made of Aluminum alloy with better heat dissipation, which has advantage of non-flammable, wear resistant [CIGARETTE LIGHTER SOCKET] Total output up to 120W (12V) / 250W (24V). Enough for daily use, fits for compatible devices, such as dash cam, GPS, vacuum cleaner, air purifier, etc [DIGITAL LED VOLTAGE DISPLAY] Monitors the health of your vehicle, boat, marine, motorcycle, etc. The blue light is perfect for night use. [INDEPENDENT ON / OFF SWITCH] With toggle switch, CHGeek USB charger features energy-saving and devices protection, expanding lifespan of devices. It conserves electricity and doesn't drain any power when switched off [APP Bluetooth Control] Smart Bluetooth connection, you can record the parking location no matter when and where you have, you can check the parking time with the mobile APP Input voltage 12-24 (V) Output voltage 5 (V) Working temperature 80 ( Celsius) Output of each usb port: DC 3.6-6.5V / 3A, 6.5V-9V / 2A, 9V-12V / 1.5A colour:black Material:plastic size:18.5x4.8x4 cm Package Contents: 1 * 4 in 1Dual QC3.0 Power Charger Only the above package content, other products are not included. Note: Light reflection 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.