It’s not a timer function but a sensor that detects signals the rices is done. Depending on environmental conditions (temperature, etc) and amount being cooked

It’s not a timer function but a sensor that detects signals the rices is done. Depending on environmental conditions (temperature, etc) and amount being cooked, will vary but the results are repeatable quality rice, rather than a fixed cook time and variable quantity rice. More expensive but better quality rice.