The Wireless Ultrasonic Water Tank Level Meter Sensor with Thermometer is a multi-color sensor with a transmission frequency of 433MHZ. It has a transmission range of 100M and comes with a transmitter size of 97*68*152mm and an LCD size of 66*45mm (3.3 inch). The sensor is designed for industrial automation and motion controls, providing accurate water level readings for various applications. Made in China, this sensor is a reliable and convenient option for monitoring water levels in tanks or reservoirs from a distance.