It can be used to build wheeled robots, 3D printers, etc. that require accurate closed-loop speed control or stepper control; it can also be used to build robot projects such as quadrupeds, hexapods, and robotic arms that require multiple servo motors (this product provides the open source structure model of the robot dog in the figure below)Up to 253 servos can be connected in series at the same timeUses a 12-bit high-precision magnetic encoding angle sensor. Compared with carbon film potentiometers, the usable angle of the magnetic encoder is expanded to 360°, and the resolution is increased by 4 times. Since there is a gap between the magnetic encoder element and the radial magnet and there is no friction, the service life of the servo motor is effectively extendedThe speed and acceleration values can be set, and the movement effect is softerThe plane spacing of the dual-axis steering disc is optimized, and the overall structure is more compact, which can make the product appearance more beautifulProduct type: ST3215-HS bus servo motorProduct torque: 20kg.cm@12VRotation angle: 360° (0-4095)Position sensor resolution: 360°/4096Mechanism limit angle: noneWorking voltage: 6-12.6VGear form: high-precision metal gearNo-load speed: 0.094sec/60°(106RPM)Encoder type: 360° magnetic encoderID range: 1-253Baud rate: 38400bps-1Mbps (default 1Mbps)Feedback: Position; Load; Speed; Input VoltageNo-load current: 240 mAStuck rotor current: 2.4AKt constant: 8.3kg.cm/AColour:As ShownMaterial:Nylon plus glass fiberPackage Contents:1x Servo-Motor KitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.