The Power Probe TeK Temperature Kit, No. PPTEMPKIT, is a dual-zone digital thermometer with a wireless remote temperature sensor. The remote temp sensor can transmit temperature readings up to 195' (60m) away from the base unit. Users can monitor temperature differences (ambient versus AC outlet, inside versus outside temps and more). The tool’s operating range and measuring range is -4 degrees F to 158 degrees F (-20 degrees C to 70 degrees C). It requires a pair of both AA and AAA batteries, with a battery life of 400 hours.