Internal antenna model  (Must buy Controller for this model)
AIR-CAP1702I-S-K9
802.11ac CAP; 3x3:2SS; Int Ant; N Reg Domain
 
 
Acess Point 1700 series (802.11ac)
The 1700 series supports 802.11ac Wave 1 standard capabilities. That includes a theoretical connection rate of up to 867 Mbps. The added throughput lets you stay ahead of growing bandwidth requirements as:
Aironet® 1700 Access Point for the latest 802.11ac Wi-Fi technology at an attractive price. 
●   More wireless clients associate with the network
●   Users tap into bandwidth-heavy multimedia applications
●   Mobile workers increasingly use multiple Wi-Fi devices