Features:For Glider/ F3KProgrammable/HV Coreless Servo.Programmable and compatible with S.Bus and S.Bus2 systems.Can be connected to a PC using the CIU-2/-3 USB adapter sold separately.Metal Final GearUpper/middle/bottom: Aluminum CaseSpecifications:Size: 23.5 mm x 8.0 mm x 19.7 mmWeight: 0.38 oz