The Seifert KL-205/38,1/SW/V/I with Heatsink: extruded; U; SOT32,SOT93,TO126,TO218,TO220,TO247,TOP3 is a thermoelectric device, usually used for cooling or heating, and can be used in a range of applications. This device is made of extruded aluminum, making it more efficient and able to withstand high temperatures. This device is mounted with screws, and has a variety of sockets to accommodate multiple components. This device is capable of switching from heating to cooling at varying speeds, making it suitable for complex applications. Additionally, this device is UL approved for added safety.