This document describes and provides specifications for several remote controlled helicopter models from Walkera. It includes the Walkera UFO 117# and UFO 8# mini helicopters, as well as several versions of the larger 4G3 helicopter, including plastic and brushed motor, plastic and brushless motor, metal and brushless upgrade, and metal and brushless upgrade with different transmitter options. All models include specifications for dimensions, motors, batteries, transmitters, receivers, and other components.