Spatial Streams (MIMO): 4x4:4 on each of the three client radios (2.4 GHz, 5 GHz, 6 GHz); MU-MIMO and OFDMA supported
Aggregate Throughput: Up to 7.78 Gbps tri-radio aggregate (maximum over-the-air PHY/chipset frame rate, not per-client throughput)
Radios (bands): Tri-radio 4x4:4: 2.4 GHz client radio, 5 GHz client radio, 6 GHz client radio; plus tri-band scanning radio (2.4/5/6 GHz) for security/RF analytics and a 2.4 GHz Bluetooth Low Energy radio
Uplink Port Speed: 1x multigigabit RJ45 (100 Mbps / 1 Gbps / 2.5 Gbps / 5 Gbps BASE-T); also 1 USB 2.0 Type-A port
Max Clients: Not published in the sources reviewed
PoE Requirement: 802.3bt (UPOE) 30.5 W for full functionality including USB; 802.3at (PoE+) 25 W supported with reduced functionality and no USB; 802.3af not supported; 54 V DC option available
Form Factor: Indoor ceiling/wall-mount access point; omnidirectional (CW9166I) or directional (CW9166D1) antenna variants
Dimensions: 241.3 x 241.3 x 56.9 mm (CW9166I) / 57.9 mm height (CW9166D1); approx. 1.6 kg
✔ Pros:Tri-band Wi-Fi 6E with 4x4:4 on every client radio for high-density capacity; dedicated tri-band scanning radio for WIPS, spectrum analysis, and location analytics; multigigabit 5 Gbps uplink on a single RJ45 port; Bluetooth Low Energy radio for beacons and asset tracking; supports both Catalyst 9800 controller and Meraki cloud management; full functionality on 802.3bt PoE with USB output
✘ Cons:Full feature set requires 802.3bt (UPOE) power, and 802.3at operation reduces functionality; only one uplink port, so no link aggregation or redundancy; premium price compared with many Wi-Fi 6E APs; maximum client count is not published in available sources; Catalyst (CW9166I-B/-E) and Meraki (CW9166I-MR) SKUs are the same hardware under different management licences, which can confuse purchasing; end-of-sale/end-of-life status is unconfirmed and should be checked with Cisco
Est. Price:
$1,136 - $3,317
Compare Against
Aruba (HPE) Instant On AP33
★ 3.5 Value Score
Technical Specifications
Wi-Fi Standard: 802.11ax (Wi-Fi 6)
Spatial Streams (MIMO): 3x3 (both 2.4 GHz and 5 GHz)
Aggregate Throughput: 3 Gbps
Radios (Bands): Dual-band (2.4 GHz and 5 GHz)
Uplink Port Speed: 2x 2.5 Gigabit Ethernet
Max Clients: 128
PoE Requirement: 802.3bt High Power PoE (90W)
Curation Review
✔ Pros:Wi-Fi 6 (802.11ax) delivers excellent throughput and multi-device capacity; Dual 2.5G uplink ports provide redundancy and higher backhaul bandwidth; 802.3bt High Power PoE flexibility enables cable runs up to 100m; Cloud-managed via Instant On portal with intuitive SMB-friendly dashboard; Compact form factor with modern industrial design; WPA3 security support and automatic firmware updates
✘ Cons:Requires 802.3bt High Power PoE infrastructure which may demand switch upgrades; No Wi-Fi 6E or 6 GHz band support limits future-proofing; Premium pricing compared to lower-tier Instant On models (AP15/AP17); Limited advanced enterprise features versus Aruba AOS/CX access points; High power consumption (90W) may increase cooling costs in dense deployments; Smaller maximum SSID count than enterprise alternatives