The Robin Proline Compact doorbell is the only HomeKit doorbell that supports PoE (Power over Ethernet), as of March 2023. Here’s a look inside it.

The motherboard sits on 6 plastic standoffs. Not pictured here are some plastic M3 bolts that fasten the PCB. Beware that one of the black standoffs is longer than the rest despite looking similar.

The camera lens is assembled with the green motherboard. There is a small wire harness that connects the white daughterboard.

Internal storage is provided by a SanDisk Edge 16GB Micro SD card with an A1 random I/O speed rating.

The lens assembly is fastened to the motherboard by 2 screws. Removing it reveals the image sensor, which is quite small. Although the sensor is 5MP according to Robin, the doorbell has a measly video resolution of 1280×720.