This is an MKS HV777A+ Coreless Titanium Gear High Torque Digital Servo with an Aluminum Upper Case.

Specifications:

• Torque:
• @6.0V: 409.7 oz-in (28 kg-cm)
• @7.4V: 506 oz-in (36.5 kg-cm)
• @8.2V: 561.1 oz-in (38 kg-cm)
• Speed:
• @6.0V: 0.13 s
• @7.4V: 0.11 s
• @8.2V: 0.10 s
• Weight: 75.45 g
• Dimension: 40x20x45mm
• Working Voltage: 4.8 ~ 8.4 V DC Volts (2S Lipo un-regulated)
• Working Frequency: 1520μs / 333hz
• Dead Band: 0.0008 ms (Default)
• Bearing: Double bearings
• Motor: Coreless Motor
• Gear: Titanium alloy gear