Geevon Wireless Indoor Outdoor Thermometer Hygrometer — 5" Backlit Display with 3 Remote Sensors, 24h Max/Min

Geevon's wireless indoor/outdoor thermometer is a battery-powered digital hygrometer with a 5-inch backlit display and three remote sensors to monitor temperature and humidity across four locations.

Keep simple, reliable environmental data at a glance with a compact tabletop or wall-mount display that records current readings, 24-hour max/min history and trend arrows. The unit communicates with up to three remote sensors (433 MHz) up to 200 ft/60 m away, offering simultaneous readouts for living rooms, basements, greenhouses or nurseries. A comfort indicator and optional audible alerts help you notice when values move outside your chosen range.

How accurate and wide-ranging are the temperature and humidity readings?

The Geevon monitor provides practical accuracy for everyday home and hobby use. Temperature readings are given with ±1.8°F (1°C) precision and the device covers both indoor and outdoor ranges suitable for most climates. Humidity is measured within a 20–95% span with ±5% accuracy, and the unit identifies dry, comfortable, and wet ranges to help you assess conditions quickly.

• Indoor temperature range: 50°F to 140°F (−10°C to 60°C)
• Outdoor temperature range: −58°F to 158°F (−50°C to 70°C)
• Humidity range: 20%–95% RH with ±5% accuracy
• 24-hour max/min recording and trend arrows for short-term changes

How do the three remote sensors work and where can I place them?

The system supports up to three wireless sensors that pair to the main display, displaying readings from up to four distinct locations at once. Each sensor transmits on 433 MHz and has a typical working distance of up to 200 ft/60 m in open air; actual range varies by obstacles and building materials. Sensors are compact, battery-powered, and can be mounted, stood on a surface, or placed outdoors in a sheltered spot.

• Three remote sensors included; monitor four zones simultaneously
• Wireless range up to 200 ft/60 m (line-of-sight, subject to interference)
• Tabletop or wall-mount options for both display and sensors
• Sensors powered by 2×AAA; display uses 2×AA (batteries not included)

What display features and alerts help me spot changes quickly?

The 5-inch LCD shows bold black numbers for easy daytime reading, plus an 8-second backlight for checking values at night. Max/min memory stores highest and lowest readings over the past 24 hours, and trend arrows indicate whether temperature or humidity is rising or falling. You can also program audible hi/lo alarms to notify you when readings breach the thresholds you set.

• 5-inch large LCD with 8-second backlight for low-light viewing
• 24-hour max/min memory and trend arrows for quick context
• Adjustable temperature and humidity alarm limits with sound
• Switch between °C and °F using the MEM button

How easily does this unit fit into different rooms or uses?

Geevon designed the base station to sit on a desk or hang on a wall, making it simple to position wherever you need environmental awareness. The compact sensors are suitable for bedrooms, wine cellars, greenhouses, grow tents, basements, and offices — anywhere you want continuous monitoring without complex wiring. Batteries power the system, so installation is tool-free and portable.

• Desk or wall-mountable main display for flexible placement
• Ideal for bedrooms, nurseries, basements, wine cellars, greenhouses
• Battery-powered sensors for easy, cable-free installation
• Clear comfort indicator helps interpret humidity and temperature quickly

Who this is for: homeowners and hobbyists who want an easy-to-read, multi-zone environmental monitor without installing wired systems. It suits gardeners, small-scale growers, wine and food stewards, parents monitoring nursery conditions, and anyone tracking indoor/outdoor conditions across several rooms. If you want straightforward readings, 24-hour history, and remote coverage from three sensors, this Geevon unit provides a convenient, battery-powered solution.