The Haglof T3 Transponder is a very useful accessory for the Vertex laser range finders. The T3 Transponder features an ultrasonic transmitter and receiver that communicates with your rangefinder tool.
The T3 Transponder Haglof Range Finder accessory can operate in 2 modes: the 60 degree mode is used to take height measures, you can place it directly to a tree or a pole.
The 360 degree mode allows you to take circular measures and requires the 360 degree adapter and the Plot Centre Staff. When using the laser measuring method on the laser rangefinder, the T3 Transponder can be operated as a reflector or a visible target point.
The T3 Transponder uses one AA battery and it has a beep signal that indicates when it's on or off. The on and off status of this accessory is remotely controlled by your Vertex laser range finder.