Sper Scientific 800007 2 Channel Thermocouple Thermometer, Type K/J Sper Scientific 800007 Thermometer 2 Channel Type K/J Although mini sized, light weight and inexpensive, these units provide extremely accurate and reliable measurement with all the versatility and range of type K & J thermometers Features relative, min/max/ave temperature, hold, and touch tone buttons Come ready to use with a 9V battery and 2 beaded wire probes (Ambient Type K probe 800077)