This is the Futaba SBus Hi Torque Voltage Metal Case Car Servo.

Features:

• Programmable and compatible with S.Bus and S.Bus2 Systems
• High Voltage handles extra speed and power provided by 2S LiPo batteries
• Can be connected to PC using the CIU-2 USB Adapter (Sold Separately)

Tech Specs:
Dimensions: 1.59 x 0.83 x 1.47 (40.5x21x37.4mm)
Weight: 2.68oz (76g)