If you're a Costco member, you can save $100 on the 3-pack of the TP-Link Deco M9 Plus tri-band mesh networking Wi-Fi system. That brings the total cost down to $219.99 from $320. The 2-pack commonly sells for around $210 at retailers like Walmart, so you're basically just paying another $10 for a third satellite you can use to extend the system even farther.

The Deco M9 Plus is TP-Link's most powerful mesh networking system. You'll be able to cover up to 6,500 square feet in Wi-Fi. The tri-band speeds up to AC2200 have a dynamic backhaul that can support up to 100 devices. With the Deco M9 Plus's intelligent network, you'll be able to move throughout your home with just a single Wi-Fi name and password without worrying about your connection as you switch devices. The Deco M9 Plus is also unique in the Deco lineup in that it's the only one with a built-in smart hub that can control ZigBee, Bluetooth, and Wi-Fi smart home products.

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