Product features: manual and automatic feeding; suitable for different fish tanks and aquariums; Color: As Shown Material: plastic Product Settings:Switch on and off the machine: and hold the "on-off key" for 3 seconds to switch on and off the machine Manual feeding: to feed in real time, if you it in the settings, it means "save current settings and exit". Time setting: and hold the "Setting key" for 3 seconds, the hour number flashes, "/" to adjust the hour and then the "Setting key" to adjust the minute. Setting of feeding time and feeding laps: After adjusting the time, continue to the "Setting button". At this time, the first box below starts to flash. Refer to the "Time Setting" to adjust the feeding time, and then the "Setting button" and display "" " represents the number of turns of the food box, if there is no number, it not rotate. Continue to the "set button" to set the feeding time and feeding circles four times in turn and hold "" for 5 seconds for the default feeding setting: 1 feeding at 8:00 in the morning and 1 feeding at 8:00 pm Long "" for 5 seconds to delete all feeding settings Package Contents: 1 x feeder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.