Features: 【Wireless Sensor】 Capable of displaying the readings from up to 1 outdoor remote sensors. Wireless remote sensor range: 197ft(60m) 【Touchscreen】 Features with backlight and touchscreen, easy to operate and read the data clearly in the dark. It will automatically turn off after 10s without any operation. 【24 Hour/All Time】 Press and hold "℃/℉ HISTORY" for 3 seconds to check the temperature and humidity in the past or last 24 hours. Press and hold "MAX/MIN CLEAR" for 3 seconds to clear the record max and min recordings. 【Trend Indicator】 Displays the current humidity, temperature, trend. There are 3 levels icon: Dry, Comfort and Wet. The temperature range from -4℉ to 158℉（-20℃ to 70℃), Humidity range from 20% to 95%. 【Battery Type】 Station:2*AAA 1.5V batteries; Sensor: 2*AAA 1.5V batterie(Battery not included). Once the remote sensor or the station out of power, the charge icon will appear to remind you replace the new battery. Note: ▲The main unit displays 3 different sensors records every 5 seconds recurrently, not always showing. ▲The outdoor sensor start reading the exact value and transmitting the signal after 30 minutes. ▲Please make sure both units are placed out of direct sunlight and away from any heat sources or vents. Specifications: ●Wireless Range: 197ft (60m) ●Indoor Temperature Range: -20℃ to 70℃ ●Outdoor Temperature Range: -40℃ to 70℃ ●Humidity Range: 20% to 95% ●Temperature Resolution: 0.1℃ ●Humidity Resolution: 1%RH ●Refresh rate: 10 seconds ●Station: 2*AAA Battery (Not Included) ●Sensor: 2*AAA Battery (Not Included) Package Including 1 x Main Unit 3 x Transmitters 1 x User Manual Manufacturer Information: Company: BLACKSTONE ELECTRONICS CO LIMITED Address: UNIT D12 ON 16TH FLOOR JING HO INDUSTRIAL BLDG NOS.78-84 WANG LUNG ST TSUEN WAN NT Email: black_stoner@outlook.com Tel: +8618123753837