This meter allows you to monitor the outdoor water tank condition 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 readings. 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 for safe operation. Supports 12/24-hour time format and displays water level in meters or feet. Includes two alarm modes: high and low level alerts. Receiver powered by 2 x AA 1.5V batteries (not included). Outdoor transmitter requires 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. Other items not included. Note: Light reflection and display differences may cause slight color variation between image and actual product. Measurement allowance: ±1-3 cm.