ITEM NAME:Dual USB 12V Electronic Car Charger Adapter Socket w/ Voltmeter Ammeter Display Product Description Description: Boat Motorcycle Car 12V Dual USB Electronic Car Charger Adapter Socket w/Digital Voltmeter Ammeter Display Feature: The refitted on-board charging system uses standard 28mm mounting holes, which can replace the position of the car charger installed on the original vehicle. It uses dual-port USB output, with a single port up to 5V2.1A and a double port up to 4.2A. Specification: Interface type: 6mm copper input socket, dual USB port output Product color: black Display color: red LED Input voltage and current: 12V/24V 2A (max) Output voltage and current: 5V4.2A (dual-port total power, single-port 5V2.1A) Installation hole size: 28mm, can replace the original car charger installed in the car, motorcycle charger position Product size: 54mm*35mm*28mm/2.12*1.37*1.1'' Packaging size: 15*10*5cm/5.9*3.93*1.96'' Gross weight: 28g Net weight: 26.5g Packing method: bag packing Product Material: ABS Shell Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. Included: 1 X Dual USB Electronic Car Charger Adapter.Interface type: 6mm copper input socket, dual USB port output. It uses dual-port USB output, with a single port up to 5V2.1A and a double port up to 4.2A. Due to the different display and different light, the picture may not show the actual color of the item.