[Main Function] The water level sensor records the minimum and maximum water tank levels. When installed on the top of a water tank, the transmitter quickly and accurately measures the water level using an ultrasonic sensor and temperature via a thermal sensor. [Convenient] The screen simultaneously displays the indoor temperature and water tank temperature. The receiver can be placed on a table or mounted on a wall, offering convenience for everyday use. [Wide Range] Indoor temperature range: 0 to 60°C; outdoor temperature range: -40 to 60°C; temperature accuracy: ±1°C. Water level measurement range: 0 to 15 meters, resolution: 0.01 meters, accuracy: ±0.03 meters. [Multifunctional] The ultrasonic tank level gauge displays room temperature, tank temperature, and water temperature using a 10-segment LCD bar graph. It allows users to save minimum and maximum records and set alarms for high/low water levels or empty tank conditions. Wireless transmission range up to 100 meters (300 feet) in open areas. This device is easy to install and capable of monitoring water tank depth, water temperature, and indoor temperature. Features: - Displays tank level using a 10-element LCD bar graph - Stores minimum and maximum liquid level records - Supports high/low water level alarms and empty tank alerts - Simultaneously shows indoor temperature and tank temperature - Receiver can be tabletop or wall-mounted Specifications: - Main material: Plastic - Color: White + Black - Indoor temperature range: 0 to 60°C - Outdoor temperature range: -40 to 60°C - Temperature accuracy: ±1°C - Water level measurement range: 0 to 15m - Resolution: 0.01m - Accuracy: ±0.03m - Transmission frequency: 433 MHz - Transmission range: 100 meters (300 feet) in open area - Transmission interval: 30 seconds if level changes, 3 minutes if stable - Receiver battery: 2 x AA 1.5V LR3 alkaline batteries (not included) - Transmitter battery: 6 x AAA 1.5V LR6 alkaline batteries (not included) - Battery life: Up to 12 months for receiver and transmitter - Receiver dimensions: 105 x 93 x 25mm / 4.1 x 3.7 x 1.0in - Receiver weight: 93g / 3.3oz - Transmitter dimensions: 155 x 95 x 65mm / 6.1 x 3.7 x 2.6in - Transmitter weight: 125g / 4.4oz - LCD size: 66 x 45mm / 2.6 x 1.8in - Packing size: 165 x 110 x 105mm / 6.5 x 4.3 x 4.1in - Package weight: 288g / 10.2oz Package Contents: 1 x Water Level Sensor Transmitter 1 x Indoor Receiver 2 x Screws