Product descriptiontec1 12706 6A Peltier module thermoelectric cooling device is a semiconductor module commonly referred to as etc. The, Theroelectric cooler, Peltier plate module contains 127 semiconductor pairs within a 40mm by 40mm area, Providing highly efficient cooling and quickly warms to 90c. Get ice cold in minutes or heat to boiling by simply reversing the polarity, Used for numerous applications from cpu coolers to alternate power sources, Or even for your own custom car drink warmer/cooler. Operating tips operating temperature 138 degree c do not exceed imax or vmax when operating module. Please carry out moisture protection options sealing in final application use. Expected lifespan of 200, 000 hours calculated from failure rate Extended trials with a 0. 2% rate important note heat side requires heat sink all the time. Do not run this device with a power supply more than a few seconds without a heatsink mounted to the device! package includes 2 x tec1 12706 40x40mm thermoelectric cooler 6a peltier module