float controller is to adjust a barrel, grooves or level switch. It can be automatically adjusted, easy to operate, easy to install, safe and reliable, maintenance-free, environmentally friendly.It is resistant to sewage. Widely used in households, factories, mines, etc. pools, oil, weak acid and weak pools, barrels, troughs, irrigation containers, etc. Such as connecting two controllers in series, where one is put in the pool, add one to the well to control the water pump. It can prevent the pump equipment from being damaged due to the shortage of water source It is also possible to connect three controllers in series, and put one in the water tower, one to the filter tank to the river (well) can control two pumps at the same time. size: Power cord length Material: Plastic colour: yellow+blue Package Contents: 1 x Float Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.