For its "M" Club members only, mwave.com offers the Premiertek 802.11n 9dBi Screw-on Antenna, model no. ANT-9dBi-RE, for $4.50. ("M" Club membership is free; click here to join.) With free shipping, that's just under our mention from July and the lowest total price we could find for such an item by $9. This antenna purportedly increases wireless signal strength from 2dBi to 9dBi. It screws directly onto a router or network adapter.
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