1. Adopt 12-bit high-precision magnetic encoder angle sensor. Compared with the potentiometer, the angle is expanded to 360degree , and the resolution is increased by 4 times. Since there is a space between the magnetic encoder elements and the radial magnet, there is no friction, so the service life of the servo is effectively extended 2. The shell adopts the structural design of higher strength engineering plastic shell and double- low shell, optimizes the plane spacing of the double- rudder plate, and the overall structure is more compact, which can make the appearance of the product more beautiful 3. One-key calibration of the median, 360degree installation at any position, one-key to correct the current position to the median, very convenient for installation 4. The two-way feedback servo can feed back information such as position, load, speed and input voltage in real time, and control it at all times. 5. When the voltage is 12V, the torque can reach 30kg.cm, which can be used to build four-legged, six-legged, robotic arm and other robotic projects that require multiple steering gears, and can easily handle large people Product Type: ST3215 Servo Bus Servo Product torque: 30kg.cm@12V Rotation angle: 360degree (0-4095) Position sensor resolution: 360degree /4096 Mechanism limit angle: Working voltage: 6~12.6V Gear form: high precision metal gear No-load speed: 0.222sec/60degree (45RPM)@12V Encoder type: 360degree magnetic encoder ID range: 0~253 Baud rate: 38400bps~1 Mbps (default 1Mbps) Feedback: Position; Load; Speed; Input voltage No-load current: 180mA Stall current: 2.7A Kt constant: 11kg.cm/A Colour:black Material:Plastic + Metal Size: 45.22 x 37.25 x 24.72mm Package Contents: 3 x 30kg serial bus servo 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.