Features: Base on the ESP32-WROOM-32 modules, supports wireless communication such as WIFI, Bluetooth-compatible and ESP-NOW; Onboard motor control interfaces for 2xDC motor with encoders or 4xDC motor (2 groups) without encoders Onboard bus servos control interfaces for controlling up to 253 ST3215 bus servos and obtaining servos feedback; Onboard 9-axis IMU to obtain attitude and information; Supports 7~13V power input, and can be powered directly by 2S or 3S li-battery modules; Automatic download circuit for easy uploading programs; Support input voltages/current monitoring;Provides open-source demos and detailed tutorials for beginners; Specifications: Material:PCB Size:Approx.65x65mm/2.56x2.56in Power Supply:DC7~13V Antenna Connector:IPEX1 Control Modules:ESP32-WROOM-32 Control Chip:ESP32 Mounting Hole Spacing:4958mm Download Interface:Type-C Power Interface:XH2.54 Mounting Hole Diameter:3mm Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xDriver Board