802.11AC Wave 2 MU-MIMO (Multi-User, Multiple Input, Multiple Output) technology allows a Wave 2 AP to communicate with multiple clients at the same time - significantly increasing multi-user throughput and overall user experience.

MU-MIMO Assuming the same conditions, a Wave 2 AP provides up to 75% improvement* overall over a Wave 1 AP. This improvement increases wireless performance and/or serves more clients at the same performance level.

4x4 Spatial Streams At any single time, a Wave 2 AP can communicate with the following MU-MIMO clients:
four 1x1 clients
two 2x2 clients
one 2x2 client and two 1x1 clients
one 3x3 client and one 1x1 client
A 4x4 Wave 2 AP delivers up to 33% greater performance than a Wave 1 AP that is 3x3 in both radio bands.

Real-World Performance The UniFi AC HD AP is the first UniFi 802.11AC Wave 2 AP. Combining the performance increases from MU-MIMO technology and the use of 4x4 spatial streams, the UniFi AC HD AP delivers up to 225% greater performance* than a typical Wave 1 AP.