This meter allows you to monitor the outdoor water tank level from inside your living room. Mount it on top of your water tank to measure precise temperature using an ultra sensor. View indoor temperature, tank temperature, and water level. Store min/max records and set alarms for high, low, or empty water levels. 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. Time display in 12 or 24-hour format. Tank level can be displayed in meters or feet. Two alarm modes for water level: high and low. Powered by: Receiver: 2 x AA 1.5V (not included) Outdoor transmitter: 6 x AAA 1.5V (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 Only the above items are included; other items are not included. Note: Lighting and display differences may cause slight color variation between the image and the actual item. Measurement error allowance: ±1-3 cm.