[Main Function] The water level sensor records the minimum and maximum water tank levels. When installed on top of the water tank, the transmitter quickly and accurately measures water level using an ultrasonic sensor and temperature using 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 daily use. [Wide Range] 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. [Multifunctional] The ultrasonic tank level gauge displays room temperature, tank temperature, and water temperature using a 10-segment LCD bar graph. It supports min/max data storage and allows setting alarms for high/low water levels or empty tank conditions. Transmission range: up to 100 meters (300 feet) in open areas. This sensor is easy to install and can monitor water tank depth, water temperature, and indoor temperature. Features: - Monitors tank level and displays it via a 10-segment LCD bar graph - Stores minimum and maximum liquid level records - Supports high/low level alarms and empty tank alerts - Simultaneously displays indoor temperature and tank temperature - Receiver can be table-mounted or wall-mounted Specifications: - Main material: Plastic - Color: White + Black - 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 15m - Resolution: 0.01m - Accuracy: ±0.03m - Transmission frequency: 433 MHz - Transmission range: 100 meters (300 feet) in open area - Transmission interval: 30 seconds when level changes, 3 minutes when 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: At least 12 months for receiver and transmitter - Receiver dimensions: 105 x 93 x 25mm (4.1 x 3.7 x 1.0 inches) - Receiver weight: 93g (3.3 oz) - Transmitter dimensions: 155 x 95 x 65mm (6.1 x 3.7 x 2.6 inches) - Transmitter weight: 125g (4.4 oz) - LCD size: 66 x 45mm (2.6 x 1.8 inches) - Packaging dimensions: 165 x 110 x 105mm (6.5 x 4.3 x 4.1 inches) - Package weight: 288g (10.2 oz) Package Contents: 1 x Water level sensor transmitter 1 x Indoor receiver 2 x Screws