There are two timing modes: 12h and 24h; while the factory default cycle is 12h. By pressing the key “Mode/View”, you can inquire the current timing mode. If the yellow indicator light flickers for 3 times, it means 12H mode; if the green indicator light flickers for 3 times, it means 24H mode. If you press the key “Mode/View” for 3 seconds, the timing mode will change for one time, the corresponding indicator light will flicker for 3 times; meanwhile, the timer will return to zero automatically. If you press the key “Start”, the autofeeder will rotate for a cycle forcibly and conduct feeding for one time. Meanwhile, the timer will return to zero automatically, and start timing from scratch. However, the timing mode will not change. Users are advised to change batteries once half a year.