1. SMART JUMPER CABLES: these car battery jumper clamps are designed to be compatible with ET03 12V jump starters. Other models of jump starters might be incompatible with these jumper clamps. 2.D MATERIAL TO LAST LONG: these jumper clamps are of high quality and can provide allaround protection. It comprises a coppercoated aluminum cable and strong clutch spring cable clamps, which have strong conductivity. 3.10 COMPREHENSIVE PROTECTION SYSTEMS: these spray gold intelligent jumper clamps are to use with 10 smart protections such as surge voltage protection, overcurrent protection, reverse polarity protection, hightemperature protection, high voltage protection, short circuit protection, overdischarge protection, reverse connection protection and so on. 4.EASY TO USE: these smart jumper clamps are super easy to use. It is more like a plugandplay that can get your car started in minutes. There is an indicator light on the jumper clamps to help you check whether the clamps are in the right working status.