[Multifunctional Display]: Equipped with a 4-inch LCD backlit touchscreen, this weather station displays temperature and humidity for up to 4 locations. Features include C/F options, historical data, trend indicators, clock, and alarm settings. The outdoor sensor provides temperature, humidity, battery status, and channel information. [Long-Lasting Battery]: The main unit's backlight turns off after 30 seconds to conserve energy, powered by 3xAAA batteries. The remote sensors update every 10 seconds and are powered by 2xAA batteries, offering approximately three months of monitoring before a low battery alert is issued. [Easy Setup & Flexible Placement]: With a 100m transmission range, set up your 3 wireless sensors anywhere within range for comprehensive coverage. The monitors' wireless design allows for mobility and multiple mounting options including hanging, standing, or magnetic attachment. [Reliable Measurements]: Operating between -4F to 158F (-20C to 70C) with a humidity range of 20%-95%, the weather station offers precise readings and is IPX4 waterproof, making it suitable for a variety of environments. [Ideal for Sensitive Environments]: Monitor environmental conditions effectively when caring for babies, the elderly, or the sick. This weather station helps you adjust settings to maintain comfort, ensuring a safe and stable environment for vulnerable individuals. Indoor temperature range: -4F - 158F (-20C - 70C) Outdoor temperature range: -40F - 158F (-40C-70C) Humidity range: 20%-95% Temperature display unit: C/F optional (default is C) Temperature resolution: 0.1C/F Humidity resolution: 1% Refresh rate: 10 seconds. Error: Temperature plus or minus 1 Humidity plus or minus 5% Wireless reception range: 100 meters RF wireless frequency: 433 MHz Time function: 1 set of alarm clocks Snooze function Backlight function (backlight duration 30 seconds) Power supply: Indoor unit: 3xAAA battery (battery not included in shipment) transmitter: 2xAA battery (battery not included in shipment) Color: Black & White Material: Plastic Package Contents: 1 x Indoor unit 3 x transmitter 4set x Installation hook Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.