EnGenius ESR1750

Overview
"ESR1750-0.20 LFP" is silkscreened on the mainboard in the FCC photos.
 * "PAC3300-0.20 LFP 94V-0 1343" is silkscreened on the wireless module.

The FCC ID on the label on at least some of these devices appears to be A8JESR900 <??>.
 * The newer A8JESR1750 FCC ID was issued before the end of 2013.

The filings for this FCC ID do indeed mention the ESR1750 and ESR1200 within the test report...
 * but only 802.11n (and lower) rates seem to be tested (there is no mention of 80MHz / VHT modes)
 * and the photos cover the ESR900 only (w/ its 3x3 11an AR9580 radio).

Additional specifications, per EnGenius's product page, follow...
 * Weight: 0.5 lbs
 * Diameter: 6.36"
 * Height: 1.64"

Default settings (including the SSID formats and the presumed used 88:DC:96 OUI) are per the FCC sample label.

Reviews

 * EnGenius Dual Band Wireless AC1750 Cloud Gigabit Router with USB Port and EnShare Reviewed on SmallNetBuilder
 * CPU: Qualcomm Atheros QCA9558 @720MHz 3T3R 802.11n WiSoC
 * RAM: 128 MB ??, Flash: 16 MB
 * 2.4GHz Radio: Qualcomm Atheros QCA9558
 * - 2.4 GHz Power Amp SST 12LP15A (x3)
 * 5GHz Radio: Qualcomm Atheros QCA9880
 * - 5 GHz Power Amp marked 15E37TV (x3)
 * Switch: Qualcomm Atheros QCA8337

Additional external links

 * EnGenius Launches 802.11ac Line on SmallNetBuilder
 * EnGenius ESR1750 on OpenWrt wiki (bootlog)