... AC plug in home. *Full polyurethane-foam lining CFC, no noise, it can be use any where. *Voltage: Dc ... sample after payment.Advantage1.semiconductor technologies 2. no compressor,no vibration 3.low noise . 4.cooling repidly & stronger cooling effect ... conductor refridgraton technology, the products have characteristics such as no noise, no vibration, long sevice life, low power consumption, environment ...