YX055-CEL - Yagi Directional Signal Antenna Upgrade provides additional coverage by boosting the outside signal strength in the direction it is pointed. This antenna provides 15dBi of gain to strengthen the signal. 824-896 MHz 18 element directional yagi antenna. 15dBi gain. 63" long x 7.5" wide x 1.5" deep. Fits on masts up to 1 5/8" diameter. 75 ohm type F female termination on short jumper.