Based on a the usual AA battery powered clock design, yet somehow it only feeds once per 24hours
It's a bit big for a single fish since many people do not give a single betta that large of a bowl! We put the adjustable legs back and clamped it to the side of our hex shaped bowl. The rubber that was on the clamp was destroyed out of the box - someone/somethign had cracked the screw so tight that it destroyed the soft rubber foot. But it stays just fine.
It only drops a few round pellets at a time, which is great, but... despite appearing to be yet another feeder based on a AA powered clock module, it only feeds once every 24 hours. I expected it to rotate like the hour hand and feed twice per day. I suppose it keeps the tank clean longer but our little guy eats more than 4 pellets in 24 hours!