Colpac Chilling Unit #C-2 Heavy-duty compressor for more efficient cooling * Specially designed interior chilling coils cool packs faster * 3 (8 cm) swivel-type rubber casters for silent friction-free movement of mobile units * UL listed (120 Volt) * Complete with 6 standard size ColPacs * Temperature Range -12 Degrees to -6 Degrees Celsius. *