The monopod accessory or plot center staff is used with the 360° adapter and the T3 Transponder to deliver circular measures. Once connected to your Vertex Laser Rangefinder you can measure 360° around the monopod using the ultrasound technology.
This telescopic plot center staff can be adjusted, only weighs 9.5 oz and is made of aluminum and plastic. It comes in 2 parts and can reach up to 4.6'.