Ecowitt WH0299 Wireless Digital Temperature / Humidity Monitor with WN31 Sensor

Features: Real-Time MonitoringDisplays current temperature, humidity, and RF signal strength with support for 8 channels. Historical Data TrackingRecords maximum and minimum temperature and humidity over the past 48 hours. Multi-Sensor CompatibilityWorks with up to 8 sensors; must be paired with WN30, WN31, WN31_EP, or WN36 (cannot be used alone). Hi/Lo AlertsShows recorded high/low values for both temperature and humidity. Specifications: Model WH0298_C LCD screen 3 inch Frequency 915/868/433MHz (depending on local regulations) Update Rate About 1 minute Power Consumption minimum 1 year battery life. Base station (display console) 1 x AA battery(not included) Size 85.48 x 77.48 x 25.5mm Model WN31 Name Multi-Channel 2-in-1 Temperature and humidity sensor Dimensions 122×42×18(mm) Screen Size 22×26(mm) Weight 45(g) Material of Plastic Casing ABS Material of Screen TN-LCD Temperature Metering Range -40°C to 60°C(-40℉ to 140℉) Temperature Metering Accuracy ±1°C(±1.8℉) Temperature Metering Resolution 0.1°C, or 0.1°F Humidity Metering Range 1%RH to 99%RH Humidity Metering Accuracy ±5%RH Humidity Metering Resolution 1%RH Reading Update Interval About 60 seconds RF Connection Frequency 920/915/868/433MHz (depending on local regulations) RF Wireless Range Over 100 meters (in open areas) Operating Temperature Range of LCD Screen -10°C to 50°C(14℉ to 122℉) Operating Temperature Range -40°C to 60°C(-40℉ to 140℉) Waterproof Rating IP44 Power Supply 2 AA Batteries (not included) Battery Life 1 Year Package Includes: 1 x WH0298_C Console 1 x WN31 Temperature & Humidity Sensor