The unit provides accelerometer feedback input to the KHR-1 controllers allowing immediate correction of the robot's legs to help stabilization and avoid forward and sideways falls. It uses military grade precision ICs. With the KRG-2 fitted to the KHR-1, it is able to negotiate stairs! Unit is about 1" x 0.75" x 0.5" Instructions are Japanese pictorial style. However, it is easy to figure out how to install the unit into the robot. Note: Download any desired documentation below. Right click and select "save target as" or "save linked target as." 1 Each Twin Gyro Stabilizer (krg-2) KONGYR$199.99 Up/Down Stairs (MPG) English KRG-2 Manual (pdf) KRG-2 Software Manager Manual (pdf) Copyright © 2003-2008 E-Clec-Tech. All rights reserved. All other materials and logos are copyrighted by their respective owners, or companies.