Used RENA Automatic Aquarium Fish Feeder LG100 – Anti-Clog Heating System.

Use 110V with a 9V power adapter (included). No battery required. Can connect to Apex with EB power bar, or use a wifi  smart switch to control on/off.

The feeder itself has the following functions:

• 8 programmable feeding modes for precise scheduling.
• Manual feeding button.
• Set number of drum rotations.
• Dispenses up to 3.5 oz (100g) of dry food – flakes and pellets.
• Built-in heating module prevents moisture and food clogging.
• Button for light sensor to disable feeding at night (I have never used this function, so not sure if it works or not).