Tractor air conditioner GC-03 URL: www.guchen.com/mini-bus-van-air-conditioner/gc-03-air-conditioner.html GC03 rooftop air conditioner system is designed for tractor, truck cabin, construction machines,etc. With compressor powered by vehicle engine, and with control system powered by vehicle alternator. If interested, please kindly mail to info@guchen.com -------------- Find more details on 12v 24v DC powered AC unit here: www.guchen.com/electrical-truck-air-conditioner/dc-powered-ac.html