This is the HPP-21 PC Programmer for Hitec Digital Servos. FEATURES: Functions: Servo Test Dead Band Setting Servo Speed EPA/Fail Safe Position Overload Protection (for HS-50xx Digital Micro Servos, HS-7xxx Digital Servos) Reset Change Rotation (CW/CCW) Fail Safe (On/Off) Resolution Mode Setting (for HS-7xxx Digital Servos) INCLUDES: HPP-21 PC Programmer for Hitec Digital Servos with instruction manual REQUIRES: 4.8V or 6V Battery USB Cord Downloading the software at: www.hitecrcd.com SPECS: Length: 48mm (1.9") Width: 30mm (1.2") Height: 30mm (1.2") COMMENTS: None of the Hitec Gyro and Analog Servos are programmable cnh 2/2/09 ir/jxs