There are three different types of eeros: eeros, eero Pros, and eero Beacons.
eero Pro has the same elegant design and footprint as eero (1st-generation), but is more than twice as powerful. It is the first and only WiFi access point of its size that can broadcast on three wireless bands simultaneously (tri-band WiFi), doubling the speed of its predecessor. As the gateway of an eero WiFi system, eero has two auto-detecting Ethernet ports. One connects directly to the modem and the other port provides the option to hardwire devices like an Ethernet switch, printer, or video game console.
Further reading: What's the difference between the 1st Gen and eero Pro?
eero is the little router with a huge wireless footprint. This economical option still gives you the great speed and coverage across your home that you’re used to. With the new design to raise the antennas, the little router offers up to 1500 sq ft of coverage and can be a great addition to expand a network. With the two auto-detecting Ethernet ports, it can also be used as the gateway of an eero WiFi system. One connects directly to the modem and the other port provides the option to hardwire devices like an Ethernet switch, printer, or video game console.
eero Beacon is half the size, but even more powerful than eero (1st generation). After a year and a half of collecting customer insights and feedback, eero found that more than half of customers place eeros in stairwells, kitchens, and hallways, where cords are disruptive. With eero Beacon, simply plug each unit into a wall outlet to easily expand coverage in the home. Add as many eero Beacons as needed to provide each room with WiFi coverage.
Are eeros interchangeable?
In every network, you must use an eero or eero Pro as your gateway (the eero connected directed to your modem). This is because eeros/eero Pros have Ethernet ports on the back, which are required for creating a connection to your network. You can swap out your gateway eero with an eero Pro, eero, or 1st generation eero (just not eero Beacon).
As for the rest of your network, you can use any eero (1st generation, Pro, eero, and eero Beacon) as your additional eeros. Should you wish to hardwire your eeros, you will need to use an eero, as well as for networks where you want to connect certain devices via Ethernet.