918Mhz replacement B3 antenna is used with the old style B3 Hirschmann wireless Anti-Two-Block Switch, Angle Sensor, Wind Speed Sensor, and PRS display.  Please note this item includes the antenna only and is ONLY compatible with the older B3 transmitters.  Please confirm your transmitter states "B3" and not "B5"

( For old style 918Mhz wireless B3 load cell antenna )  

(For new PRS display unit antenna with 13 foot wire and magnetic base )

For NEW STYLE B5 2.4Ghz antenna