About the Wifi version: Easy Phone APP Feeding: Great food dispenser with remote APP control, feed your pets from anywhere anytime with your phone (Android and iOS) and track feeding records for management control. Remotely set times and amount of food to feed your pet automatically and can be shared to multiple accounts, easy to set up. Support 2.4GHz network onlyPrecise Portion Control Healthy Pet Life: 4L food capacity great for dogs and cats, program up to 10 meals to feed on your pets schedule, 1-12 portions per meal. 10s Customized Feeding Call : Record your voice messages and play it to make your pets get used to the feeder better while dispensing meals. Automatically broadcast to remind your pets that its time for meal and they will not feel lonely anymore while hearing your voice recordingDetachable Deep Stainless Steel Tray : Food-grade stainless steel tray provides healthy and hygienic feeding and save your pets from chin acne. Detachable design convenient to take apart and easy to clean.Dual Power Mode : Power the feeder via the included power adapter or 3 pieces D batteries (not included). Battery Backup ensures that your pets get fed even in a power outage. Recommended to use both battery and adapter in case any of power cut off