Material: ABSSize: About 15*11*7.5cm/5.9*4.3*2.9inchClampable thickness: ≤25mmFeed tank capacity: 200MLBattery: 2*AA battery (not included)Two fixing methods, fixed bracket fixing: suitable for open fish tank, Hook and loop fastener fixing: suitable for lacing aquarium.Instructions:Switching machine: Press and hold the “open key” for 3 seconds to switch on and off.Manual feeding: Press to feed in real time. If you press in the settings, it will be “Save current settings and exit”.Time setting: Press and hold the “Settings” for 3 seconds, the hour number flashes, press “\V” to adjust the hour, then press “Setting” to adjust the minute.Feeding time: After adjusting the time, continue to press the “Settings” button and the first box below will start to flash.Feeding circle setting: Refer to “Time Setting” to adjust the feeding time. Press “Settings” box to display “123”, which means the number of turns of the food box. If there is no number, it will not rotate. (Continue to press the “Settings” button to set the feeding time and feeding circle four times in turn).Press and hold “” for 5 seconds as the default feeding setting: 1 time in the morning and 1 in the evening.Press and hold “” for 5 seconds to delete all feeding settings.