Operates on electricity only. Designed for use at fixed locations. The freezing compartment is divided into a freezing and a storage compartment for 8 x 0.6 l icepacks. Two water filled walls separate the two compartments. Insulation materials: Polyurethane & Cyclopentane Control panel situated at the front of the unit including 1 thermostat for temperature regulation, 1 green LED indicator for "Power On", 1 relay with regulator, 1 Fuse 15 A , Cooling system: copper tube evaporator, capillary tube, wire condenser (painted) Ice-pack freezing with vaccine: 2.4 kg/10h @ 32°C ambient temperature Ice-pack freezing with vaccine: 4.8 kg/27h @ 43°C ambient temperature