mwave offers the PremierTek PowerLink Hermes 300Mbps 802.11n Wireless USB Adapter with Dual 9dBi Dipole Antennas, model no. PL-18N, for $29.99. Coupon code “5AA99303″ cuts it to $24.99. With free shipping, that’s $4 under last week’s mention and the lowest total price we’ve seen for this adapter. (It’s a current price low by $15.) It features a max speed of 300Mbps, operating distance of up to 1.2 miles, purported 10x signal strength and 1000mW power output, dual 9dBi dipole antennas, and support for WEP, WPA2, and WPA-PSK encryption. Coupon ends April 30.