This is the Align DS150 Digital Servo. The DS150 digital micro servo was developed for the T-REX 150 DFC, to increase micro helicopter control, speed and precision. This servo allows the 150 DFC to have the same flight performance as a larger outdoor helicopter and weighs only 4 grams!

Specifications:

• Cyclic Servo: Yes
• Tail Servo: No
• Plane: Yes
• Case: Composite Material
• Gear Set: Plastic
• Voltage Range: 4.8-6V DC
• Stall Torque: 0.8kg cm (5V)
• Motion Speed: 0.06 sec/60° (5V)
• Swashplate Frequency: 1520
• Dimensions: 19.8x8.4x23.3mm 
• Weight: 4.3g
• Fits the T-REX 150, 150X Series
• Increased speed and precision control
• Similar flight performance as large helicopters