mwave offers the Premiertek 802.11n 9dBi Screw-On Antenna, model no. ANT-9dBi, with a $1 mwave Gift Coupon for $5.49 with free shipping. Exclusive of the credit, that’s the lowest total price we could find by $8, although we saw it for 50 cents less last week (since expired). This antenna purportedly increases wireless signal strength from 2dBi to 9dBi. It screws directly onto a router or network adapter.

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