This is the Savox SB-2292SG Black Edition Monster Torque Brushless Steel Gear High Voltage Servo. The Savox Monster Torque servo utilizes a unique brushless motor and controller technology to boost power up to 35% over previous generation servos.

Features:

• Full Aluminum Case
• 3 Precision Ball Bearings
• Brushless Motor
  
• High Voltage
  

Specifications:

• Torque:
• @6V: 305 oz-in (22 kg-cm)
• @7.4V: 430 oz-in (31 kg-cm)
• @8.4V: 624.9 oz-in (45.0 kg-cm)
• Speed:
• @6V: 0.085/60° sec
• @7.4V: 0.07/60° sec
• @8.4V: .055/60° sec
• Dimensions (L x W x H): 40.3x20.2x38.7mm
• Weight: 81g