An Aqara Zigbee 3.0 Hub is required and sold separately. Requires a secured 2.4 gigahertz Wi-Fi network connection for Hub M2/ M1S/ E1/M1S Gen2 and Camera Hub G2H Pro/ G2H, and 2.4/ 5 GHz Wi-Fi for Camera Hub G3. (Wired connection via Ethernet RJ45 for Hub M2 is also supported). 4L tank capacity pet feeder for around 16 cups of food, best for cats and small to medium sized dogs.