The CPQ-15 antenna is a 3″x9″9″ waterproof box which contains both the 802.11b/g radio and an integrated amp and antenna. The antenna provides very high sensitivity and excellent range – up to 7 miles depending upon the access point antenna in your area. If a stronger radio is need we offer the CPQ-19 that is 3″x14″x14″. For non line of sight areas we have the 900Mhz radio which is the same size as the CPQ-19.