This automatic flusher for toilets uses a unique infrared sensor that detects your hand and automatically flushes the toilet.
High sensitivity of the toilet includes near-field infrared sensing, the sensitivity time is 0.25 seconds.
Compatible with most top flush toilet( diameter of flush valve button not exceeding 3inch). Not for side flush, combination, wall-hung, and smart toilets.
This automatic toilet flusher features a 2000mah lithium battery that is usb rechargeable for more practicality. A single charge can be enough for up to 3 months of continuous use; the circular sensor device need 2*aaa battery (it's not included).