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 the precise temperature using an ultra sensor. Check indoor temperature, tank temperature, and water level. Store min/max records and set alarms for specific water levels, including high, low, or empty conditions. Wireless transmission range up to 100 meters in open field. Water level is displayed on a 10-segment bar graph. Features tank empty alert and low battery indicator. Time display supports 12/24-hour format. Tank level can be displayed in meters or feet. Dual water level alarm modes: high and low. Powered by: Receiver – 2 x AA 1.5V batteries (not included); Outdoor transmitter – 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 + black. Material: plastic. Package includes: 1 x Water Level Sensor Transmitter, 1 x Indoor Receiver, 2 x Screws. Only the listed items are included; other products are not part of this package. Note: Light reflection and differences in display screens may cause slight variations in the color of the item shown. Measurement error allowance: ±1-3 cm.