Feature: 1. 3 Remote Sensors Simultaneous Display: Simultaneous display of 3 remote sensors, monitoring the temperature and humidity of up to 8 remote locations, easy to read 2. 100meter Transmission Distance: The transmission distance is 100meter in an open place, and the frequency is 433MHz; you can monitor different places in your home, and you can actually use anywhere in your home 3. Support Scroll Mode: The scroll mode allows you to view the indoor thermometer hygrometer and remote channels without pressing any buttons. In the scroll mode, all indoor and detected outdoor sensors will be displayed in five second intervals 4. Choose Comfortable Travel Environment: Outdoor temperature range from -40℃-60℃, indoor temperature range for 0℃-60℃, indoor and outdoor humidity range is 10% to 99%, you can choose a comfortable travel environment 5. With Alarm Function: The console has an alarm function. When the temperature and humidity exceed your preset minimum and maximum alarm settings, including sound and light alarms, which is suitable for baby rooms, offices, hotels, rooms, hospitals, laboratories, and breeding industries Specification: Item Type: Humidity Temperature Meter Model: TS-WS-10 Material: ABS Product Size: Console: Approx. 125 x 115 x 20mm / 4.9 x 4.5 x 0.8in, Sensor: Approx. 110 x 45 x 20mm / 4.3 x 1.8 x 0.8in Power Supply Mode: Console: 4 x AAA batteries (not included), Sensor: 2 x AAA batteries (not included) Open Transmission Distance: Approx. 100meter / 328.1ft Effective Transmission Distance: Approx. 30meter / 98.4ft Frequency: 433MHz Update Rate: 60S Temperature Range: Indoor: 0-60 ℃ (error: ±1℃), Outdoor: -40-60 ℃ (error: ±1℃) Humidity Range: Indoor: 10%-99% RH (error ±5%RH), Outdoor: 10%-99% RH (error ±5%RH). Package List: 3 x Outdoor Sensor1 x Console1 x User Manual Note: The outdoor unit is not waterproof, remind customers to put under the eaves where will not be exposed to rain, the product is only splashing proof, not soaking proof.