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 time Uses 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 between the magnetic encoder element and the radial magnet and there is no friction, the service life of the servo motor is effectively extended The speed and acceleration values can be set, and the movement effect is softer The plane spacing of the dual-axis steering disc is optimized, and the overall structure is more compact, which can make the product appearance more beautiful Product type: ST3215- bus servo motor Product torque: 20kg.cm@12V Rotation angle: 360 (0-4095) Position sensor resolution: 360/4096 Mechanism limit angle: none Working voltage: 6-12.6V Gear form: high-precision metal gear No-load speed: 0.094sec/60(106RPM) Encoder type: 360 magnetic encoder ID range: 1-253 Baud rate: 38400bps-1Mbps (default 1Mbps) Feedback: Position; Load; Speed; Input Voltage No-load current: 240 mA Stuck rotor current: 2.4A Kt constant: 8.3kg.cm/A Colour:As Shown Material:Nylon plus glass fiber Package Contents: 1x Servo-Motor Kit Only 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.