This is the Hitec D845WP Waterproof Monster Torque Steel Gear Servo.
The steel D-845WP is part of the D-Series servo line. All Hitec D-Series servos have been designed Hitec's cutting edge, custom engineering. Combining industry leading high-resolution, state-of-the-art ultra-response technology with a 32-bit MCU and 12-bit ADC for unprecedented programmability and flexibility, these servos deliver significantly smoother movement.
The speedy, powerful line operates on a wide 4.8 ~ 8.4 voltage range, allowing use with any common battery chemistry without the need for adapters or regulators. Featuring a 15 tooth HD output spline with 3mm hex screw, each D-Series servo brings monster performance never known before in the market.
Accessories:
Steel Gear Set: Must be serviced by Hitec Service Dept
Metal / Plastic 1st Gear Set: Must be serviced by Hitec Service Dept
Plastic / Aluminum Case Set: Must be serviced by Hitec Service Dept
Specifications: Operating Voltage Range (Volts DC): 4.8V ~ 6.0V ~ 7.4V Speed (Second @ 60°): 0.26 ~ 0.21 ~ 0.17 Maximum Torque Range oz. / in.: 454 ~ 566 ~ 698 Maximum Torque Range kg. / cm.: 32.5 ~ 40.5 ~ 50.0 Current Draw at Idle: 30 mA No Load Operating Current Draw: 1,600 mA Stall Current Draw: 10,000 mA Dead Band Width: 2 µs Dimensions (Inches): 2.59 x 1.26 x 2.44 Dimensions (Metric): 66.0 x 32.0 x 62.0 Weight (Ounces): 8.0 Weight (Gram): 227.0 Circuit Type: 32bit Programable Digital Motor Type: 5 Poles Cored Metal Brush Gear Material: Steel Bearing Type: Dual Ball Bearing Output Shaft (type / Ømm): Mega 15 Case Material: Plastic / Aluminum Dust / Water Resistance: IP 67 Connector Gauge (AWG) / Strand Count: 20 / 80