This meter allows you to monitor the outdoor water tank level without leaving the living room. Mount it on top of your water tank to measure precise temperature using an ultra sensor. View room temperature, tank temperature, and water level. Store min/max records and set alarms for specific water levels, including high, low, or empty conditions. Transmission range up to 100 meters in open field. Water level displayed on a 10-segment bar graph. Features tank empty alert and low battery indicator. Supports 12/24-hour time format. Tank level can be displayed in meters or feet. Two alarm modes for tank level: high and low. Receiver powered by 2 x AA 1.5V batteries (not included). Outdoor transmitter powered by 6 x AAA 1.5V batteries (not included). Indoor temperature range: 0°C to 60°C. Outdoor temperature range: -40°C to 60°C. Temperature accuracy: ±1°C. Water level measurement range: 0 to 15 meters. Resolution: 0.01 meters. Accuracy: ±0.03 meters. Color: white and black. Material: plastic. Package includes: 1 x Water Level Sensor Transmitter, 1 x Indoor Receiver, 2 x Screws. Other items not included. Note: Light reflection and display differences may cause slight color variation between image and actual item. Measurement error allowance: ±1-3 cm.