1、Polarity Reversal: This semiconductor refrigeration tablet reverse the polarity to get ice cold in minutes or heat to boiling. 2、Stable Performance: This thermoelectric cooler incorporates both semiconductor technologies and electronic assembly techniques for more stable performance. 3、Durable Material: This thermoelectric cooling plate adopts premium 704 silicone rubber material, which is stable and durable. 4、Wide Application: This thermoelectric heatsink is used for many applications from CPU coolers to alternate power sources. 5、Warm Tip: This thermoelectric cooling peltier can stand the temperature from minus 55℃ to 83℃. High environment temperature will directly affects the cooling efficiency.