Features: 1. Air cooling device, it is not used to cool the water but for heat dissipation by means of water circulation. 2. Can be used in small space cooling, pet air conditioner, learning the principle of semiconductor refrigeration and more. 3. Refrigeration effect depends on the size of the cooling space, ambient temperature, heat insulation, sealability, etc. 4. With strong resistance to low temperature, durable with long service life. 5. Simple structure but good practicability. Specification: Condition: 100% brand new Red Wire: "+" Black Wire: "-" Optional Type 4 chip cooler 6 chip cooler Power Supply DC 12V 24A DC 12V 36A Power 280W 420W Size 12*6.6*9.5cm / 4.72*2.60*3.74in 16*6.6*9.5cm / 6.30*2.60*3.74in Weight 611g/21.5oz 841g/29.6oz Package list: 1 * Cooler Note: 1. Package only includes the cooler, other accessories are not included. 2. Do not plug in power without water circulation for heat dissipation. 3. Please allow slight error due to manual measurement. Thanks for your understanding.