When an automatic cat feeder is required: (1) When the owner is traveling or business trip (short term); (2)obesity-prone cat/dog(control the feeding amount and time); (3)In the case of a cat who came to wake you up at night and came to wake you up early in the morning (late night) for feeding; (4)in case of owner with many overtime Infrared Detection Tech The cat food dispenser apply advanced infrared detection technology to prevent food from spilling and stuck in the hole (fit any different shapes dry foods, the food size can not exceed 0.39" * 0.39"/ 1 cm*1 cm). Auto Voice Broadcast At Meal Time Built in Voice recorder and speaker, can record your voice for 10 seconds to call pets for meals, so he/she won’t miss the meal when they are sleeping or playing. Dual Power Supply You can power the timed pet feeder via power adapter come with the feeder or 3 pieces D batteries ( not included).It is recommend to use both battery and adapter in case any of power cut off. Feed in customize Ration The auto cat feeder is designed with equal sized small grids, which decide how much food does it give for every portion. Each grid can hold 5g food, about 1/12 cup, you can give 1- 39 portions per meal to help your pet keep healthy diet. Product Specification: Material: ABS Color: White Dimensions: 21 x 29 x 38cm/8.2 x 11.3 x 14.8inch Opper Capacity: 2.5L Programmable: 1-39 portions (5g-195g) per meal, 4 meals per day Function: Timer Programmable, Voice Recorder Power by: 3 x D Batteries (Not included) or Power Adapter Application: For small and medium size pet Package Content: 1 x Automatic Pet Feeder 1 x Power Adapter 1 x User Manual