This multi-functional water level sensor is easy to install and use, it can detect tank depth, tank temperature, indoor temperature etc. It is a practical tank water sensor. Functions: This gauge monitors the depth level of the liquid in the tank and displays on a 10-element LCD bar graph. It can keep records of the min or max liquid level in the tank. Supports high or low liquid level alarm and empty liquid level alarm. Displays the indoor temperature (℉ or ℃) and the tank temperature (℉ or ℃) at the same time. The receiver can be placed on a desk or on a wall. Technical data: Main material: plastic Color: white and black Indoor temperature range: 0 - 60 ℃ Outdoor temperature range: -40 - 60 ℃ Temperature accuracy: ± 1 ℃ Water level measuring range: 0 - 15m Resolution: 0.01m Accuracy: ± 0.03 m Transmission frequency: 433 MHz! Transmission range: 100 meters (300 feet) in open area Transmission interval: 30 seconds when the level changes or 3 minutes when the level does not change Battery life: minimum 12 months for the receiver, minimum 12 months for the transmitter Receiver size: 105 x 93 x 25mm or 4.1 x 3.7 x 1.0in Receiver Weight: 93g or 3.3ounce Transmitter Size: 155 x 95 x 65mm or 6.1 x 3.7 x 2.6in Transmitter weight: 125g or 4.4. Screen size: 66 x 45mm or 2.6 x 1.8 inch Package size: 165 x 110 x 105mm or 6.5 x 4.3 x 4.1 in Package weight: 288g or 10.2ounce Package list: 1 x Water Level Sensor 1 x Internal receiver 2 x Screws 1 x transmissor do sensor de nível de água 1 x interno receptor 2 x Parafusos 2 x Viti Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.