Arrow Handheld Satellite Beam "BP" Stands for Back Pack - Two-piece Boom - Split boom. This model INCLUDES the 10W Duplexer The Arrow II line of Antennas has been engineered to provide maximum gain and efficiency in the smallest practical size & weight. Only About 19 oz. (split boom add 1 oz.) Aluminum Arrow Shafts are used for elements. The 2 in-line Gamma Matches (shown below) are pre-assembled & pre-tuned. One connector for VHF and one for UHF. Only female BNC is available. (Diplexer & Cables included with 10W Models only). The Boom is 3/4" square (with rounded corners) and 37 1/2" long. Model BP Split Boom longest part is less than 22 inches long. Note the big black foam grip for comfortable holding. Under the foam grip, the boom is drilled & tapped with a 1/4-20 hole for most camera tri-pods. Boom & elements all have plastic tips for safety. Because the antenna is hand held, power should be kept to less than 10 watts maximum. If mounted, maximum power is 150 watts.