Reefs 300 Alacritous Programmable Servo. 
Features:
Premium Versions of the 300 Alacritous that is found on the Redcat 64
Racing, Drift, Onroad, Air applications
High Speed Brushless Servo
Fully Programmable w/ REEFS Software
REEFS LINK required for Programming
Voltage 4.8V - 8.4V
Specifications:
Water Resistant: 7 Point Seals
Internal: Steel Gears / All CNC Aluminum Casing
Bearing Type: 3 Ball Bearings
Weight: 2.85oz
Dimension: 1.57 x .78 x 1.46 (LWH)
Torque: 210oz @ 6v/ 270oz @7.4v/ 310oz @8.4v
Speed: .07sec @6v/.06sec @7.4v/.05sec @8.4v
Spline: 25T
Dead Band Width: 2¦Ìs