Digital Themo-Hygrometer SK-300R SATO

Temperature and humidity measured by the child device located at up to about 90m of unobstructed distance are transmitted wirelessly to the parent device.Displays the highest and lowest values.Displays heatstroke caution level(comes with a separate sticker)and notifies with LED lamp when reaching the hazard zone.Measuring Temperature Range (C):-10 to 50Measurement Humidity Range (%RH):20 to 90Temperature Min Display (C):0.1Humidity Min Display (%RH):1Power supply: AA alkaline dry battery x 3(parent device), AA alkaline dry battery x 3(child device)(included)W x D x H: 169 x 29 x 126mm (base unit) , 65 x 22 x 129mm (handset)Installation distance: 90m(unobstructed distance)