RD20 Wireless Remote Display - Spectra Precision
The RD20 links directly with the new family of wireless receivers: LR30W, LR50W and LR60W. 
  The Spectra Precision® RD20 wireless in-cab remote display can quickly   and easily be positioned in the cab, without cables, to improve   visibility of the receiver grade information. Additionally, most   receiver functions can now be controlled in the cab with the remote.
  Features & Benefits
   Large, bright, Red, Green and Blue elevation LEDs for High, On-grade   and Low – colors are easy to distinguish for quick glance elevation   location
   Built in speaker provides distinct audible tones for High, On-grade   and Low – recognize your grade without diverting your attention from the   terrain
   In-cab control setting capability for accuracy and LED brightness –   change settings for various conditions without leaving the cab
   Additional setting control capability - including plumb indication,   blade tilt, laser offset, blade slope match - depending on receiver
   Dual power options - internal battery and machine power - increase up time and productivity
   State of the art radio - prevents interference even when multiple machines are working in the same area
   Multiple mounting systems include bolt-on, adhesive, swivel and suction cup – allows mounting in most convenient location
Introduction and Operation of the RD20 Wireless Remote Display 
 
Installation and Setup of the RD20 Wireless Remote Display