Features: We Ship via USPS First Class or priority Mail with Tracking Number for USA Customers. Overvoltage and Shortcircuit protection. Short Circuit Protection. Over Temperature Protection. Please make sure the output of adapter charger power are accordant before you use! PCB & Cover is manufactured with Fireproofing materials. Low Ripple and Noise. High Quality Raw Materials. High Power exchange efficiency to control working temperature and stable working. Specifications: Input Voltage: AC 100-240V, 50/60Hz Connector Size: Refer to the picture Cord Lenth: 4ft Compatible with: For Winplus AC54870 12V Car Jump Start Portable Power Bank Package Includes: 1 x DC Power Supply