1. Radio frequency: 433 MHz,ISM,the Tx power is 10DB and the RX sensitivity is 98DB
  2. USB receiver 4 axes (X, Y, Z, 4 axis) with LCD display real-time display
  3. Support 128*64 dot matrix input
  4. Support 100PPR electronic hand wheel function.
  5. Support the 13 shortcut keys, the user is free to define the function
  6. Wireless transmission distance of 40 meters
  7. 64 channel frequency hopping transmission, strong anti-interference, stable and reliable; the channel gap is 1 MHz
  8. Low power design, 2 AA battery for 1 months
  9. Industrial grade design, dust proof design, stable and reliable

Application:
This MPG could work with a variety of CNC systems, suitable for engraving machine industry, engraving and milling machine industry, CNC lathe industry, laser cutting machine industry, flame cutting machine industry, plasma cutting machine industry, automation production control industry.
This 4 axis controller could work with MK4 motion control card as follow.

http://www.ebay.com/itm/Upgrade-4-Axis-USB-Mach3-CNC-Motion-Control-Card-Breakout-Board-2MHz-Windows-7-/171296204984