1、Up to 253 Servos Control: This bus servo driver board allows controlling up to 253 SC/ST series serial bus servos at the same time (provided that the power supply is adequate). 2、Easy Control: This bus servo adapter is used to connect the upper computer or MCU to control the bus servo rotation, provide a convenient bus servo control solution. 3、9 to 16V Input: This serial bus servo driver board adopts 9 to 16V voltage input (Input voltage must match the servo voltage) 4、Stable Control Circuit: This bus servo control circuit driver board integrates servo power supply and control circuit, which ensures the stable running of bus servo. 5、Space Saving: This bus servo driver board for ST SC series is small and compact, space saving, suitable for embedding in a variety of projects with high space requirements. 1 x Bus Servo Driver Board2 x Accessory Item Type: Bus Servo Driver BoardMaterial: Printed Circuit BoardInput Voltage: 9 to 12.6V Voltage Input (Input Voltage Needs To Match The Servo Voltage)Communication Interface: UARTPower Supply Interface: 5.5x 2.1mm DCProduct Size: Approx. 42mm x 33mm / 1.65 x 1.30in ( Manual Measurement, Slight Error May Exist )Fixed Hole Diameter: Approx. 2.5mm / 0.10in ( Manual Measurement, Slight Error May Exist )