This is the Futaba High Voltage BLS171SV S.Bus2 Programmable Metal Gear Servo. FEATURES Brushless motor offers incredible holding power and 5X longer life than servos equipped with brushed motors Handles up to 2S LiPo power Programmable and compatible with S.Bus and S.Bus2 Dual ball bearing supported output shaft INCLUDES HV BLS171SV S.Bus2 Servo with Instructions 0.83" (21mm) Round Horn 1.8" (45mm) Round Horn 1.5" (39mm) Four Point Horn 1.2" (32mm) Six Point Horn Four each, Grommets, Eyelets and Mounting Screws SPECIFICATIONS Torque: 164 oz-in (11.8 kg-cm) @ 7.4V Speed: 0.10 sec/60° @ 7.4V Dimensions: 1-9/16 x 13/16 x 1-3/8" (40 x 20 x 35mm) Weight: 1.7 oz (48 g) SBus Programmable Defaults Dead Band Degree: 0.36 Damper Factor: 112 Stretcher Gain: 1 Boost: 5 Neutral Offset Degree: 0 Travel Adjust Percentage: 100% Reverse (Normal/Reverse): Nor Stop Mode (Free/Hold): Hold Buzzer (On/Off): Off Smoother (On/Off): On Boost (On/Off): Off Soft Start: 3.0