Features: Brand new and high quality Serial Bus Servo Driver Board, Integrates Servo Power Supply And Control Circuit, Applicable for STSC Series Serial Bus Servos, Small In Size, Easy to Integrate Supports connecting to a host or MCU to control the serial bus servos. Allows controlling up to 253 STSC series serial bus servos at the same time (sufficient power supply required) 9~12.6V voltage input (the input voltage and the servo voltage must be matching) Provides convenient serial bus servo control solution. Integrates control circuit to ensure the stable operation of serial bus servo. Compact size and space saving, suitable for integration into sorts of space-limited projects Specifications: Material:PCB Power Supply:DC9-12.6v (ST Series Servo) Power Supply Connector:5.5×2.1mm Communication Interface:UART Size:Approx.42x33mm/1.65x1.3inch Mounting Hole Size:Approx.2.50mm Mounting Hole Spacing:Approx.37x28mm/1.45x1.1inch Package Includes: 1 Set Bus Servo Adapter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.