Fealkira Automatic Motion Sensor Toilet Flush Button， It is an automatic toilet flush button, specially designed for people who pay attention to household hygiene. It solves the problem of flushing without touching the button. This innovative design can make people's lives simpler and healthier. Specification: Product: Toilet Flush Sensor Switch Battery Capacity: 2000mAh Sensor time: Mode 1： 13s -60s Small amount of water Mode 2： ＞60s Large amount of water Product Size: 73mm*50mm*32mm Package List: Toilet Flush Sensor *1 Flush Button *1 USB Charging Cable*1 How to use it -1,Clean and dry the surface of the toilet tank -2,Tear off the 3M glue -3,Install the flush sensor above the flush button -4,Install the Toilet Flush Sensor