Overview: Mode: WH1281 Wireless outdoor & indoor temperature (°C) Weather forecast tendency Forecast icons based on changing barometric pressure 12 or 24-hour time display LED backlight Included one transmitter Transmission distance in open field: 80 meter max Temperature range: -40°C to 65°C (show OFL if outside range) Indoor temperature range: -9.9°C to 80°CMeasuring range humidity: 20%~99% Base station powered by: 2XAA batteries (Not included) Temperature sensor powered by: 2XAAA batteries (Not included) Specification: Weight Approx:259g Size Approx:14.5 x 8 x 2.5