Features: 12V 100A heavy current start relay. 4.8W for 30 minutes work, 2.4W for continuous work. High quality: adopting red copper binding post, ensuring the maximum electric current can be transferred. Contact voltage is 1A, while rated voltage is 12V. Wide applications: It can be applied to automobile and large vehicles such as truck, small sized crane, combine-harvester etc. It can be served as startup switch.