12V Car Cigarette Lighter Dual Socket USB Adapter Charger and Digital Voltmeter Input: DC12V-24V ; USB Output Voltage: DC 5V ; USB Output Current: 2.1A/1A ; ( Barrel inner diameter: 2.1cm/0.82inch ; Barrel inner length: 3.6cm/1.4inch ; Overall size: about (10.5 x 5.5 x 4.5)cm / (4.1 x 2.1 x 1.7)inch Compatible with: All USB charging mobile phones or other electronic products, such as vehicle,GPS, mobile phone, camera, mp3 Wiring kit for cigarette lighters to install in any 12V-24V motorbike, boat, riding mower, tractor or car Compact design and practical function, perfect for travel use ; Run multiple accessories at one time, convenient and easy to use Provides 100% satisfaction product to our customers. If there is any issue with the product or delivery time, please feel free to send message to us before you want to leave us a feedback. We will fulfill your request promptly without any hassle.Thank you very much!