This is the JX 4.6kg 22g Metal Gear Servo (Upgrade For MJX 14701B) [PDI-2205MG].

Model:PDI-2205MG---22G 4.6KG Metal gear digital servo

Dead band: 4μs

Working frequence: 1520μs / 330hz   Motor:High quality Core Motor

Operating Speed (4.8V): 0.12sec/60°

Operating Speed (6V): 0.10 sec/60°

Stall Torque (4.8V): 3.3kg.cm

Stall Torque (6V):  4.6 kg.cm

Dimensions: 31X16.5X29.6mm

Weight:  22 g

Connector Wire Length: JR  220 mm                                    

Gear teeth:21T

Bearing: 2BB