SMC SMC2890W-AN

Overview
The device likely uses AR934x + (AR9280 / AR9382 / AR9582).

"P/N: 142000000596A REV: 01" is silkscreened on the main board in the FCC photos.
 * "P/N: 142000000597A REV: 01" is silkscreened on the wireless module.

Additional models covered by this FCC ID in the FCC test report follow...
 * Accton OAP9112A-17
 * Edge-corE ECWO5110 and ECWO5110-L
 * SMC SMC2980W-AN, SMC2891W-AN, SMC2890W-AN-L, SMC2891W-AN-L

The SMC2891W-AN appears to have an integrated 5GHz directional antenna.

Default credentials are per the FCC manual.
 * The manual also specifies the default SSIDs as EAP9112A_11BGN_0 (through _15 for VAPs 0-15) and EAP9112A_11NA_0 (through _15 for VAPs 0-15).

Possible B8:9B:C9 (SMC Networks) OUI (on FCC EUT MAC label)

Links of Interest
Datasheet