100% new quality This product is based on actual needs of home factory, pumping and testing pool (water tower) to control water level to achieve control. It has characteristics of small size, simple wiring, low power consumption, large switching capacity, strong interference and stable function. When you turn it on automatically, you can pump pump ( valve) stably (water tower), and automatically stop pump (solenoid valve) when it is full of water. Local flooding can also be used for automatic drainage, such as garages, basements, etc. Board size: 7cm x 4cm (length x width) This product does not require purchase of another probe, and home wiring can be used instead of probe. Colour: as shown Material: plastic Package Contents: 1 x Liquid Level Switch Sensor Note: - The probe is a wire mesh shell with plastic buckle wire, which can directly induce household wires. The head of wire is stripped about 2 cm, making it impossible to directly sense. Another: the product does not include (probe) Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.