Features: brand new and high quality Convenient to use. It is very helpful and useful. Semiconductor coolers are a form of solid state cooling that incorporates both semiconductor Technologies and electronic assembly techniques. Must fititng Radiator Heatsink when Power ON,not resposible for Burn Peltier if Heatsink is not Assemble. The item is finished kit. Specifications: Material: ABS + Aluminum alloy Cooling power:72W Power: 12VDC 6A (not include in this Kit) Red line: "+", black line: "-" Item Size: approx. 90x90mm/3.54x3.54in Net weight: 350g Main color: silver Tips: cold end frost require ambient temperature is low, is not what the environment can be frost, frost ambient temperature below 25 degrees. Note: 1: This module installation is assembled and you do not need to use your hands 2: This module without power, without thermometer. 3: Test ambient temperature of 26 degrees. Package includes: 1 x Thermoelectric Peltier Refrigeration Cooling System Kit Cooler