· Lifetime NRA member
I would imagine instead of a handle there is a sensor of sort that controls it.
It is a simple radar like system tuned to go through a toilet lid it senses something over the area the signal is sent out because the signal is reflected back to the sensor by your hand instead of not coming back.^^^ No, there isn't. Did you watch the video? Just a sticker that tells people to wave their hand in that area. The sensor is on the inside of the tank.
The next video is worth watching too.