Features: 1. Compatible with pyboard interface 2. Automatic download circuit 3. On board lithium battery input interface and charging circuit 4. The buttons and LEDs are arranged neatly and the silk screen is clear Specifications: Pyboard interface: supports pyBoard, pyWiFi-ESP8266, pyWifi-ESP32 2.54mm row pin: lead out all interfaces of pyboard Two keys: leading out and keys Potentiometer: ADC input Passive buzzer: output Button battery holder: install CR1220 button battery Servo interface: steering gear interface X1-X4 (external isolation circuit is required to connect the steering gear) OLED interface: 4P/0.96 inch/I2C/OLED display 1.77 inch LCD interface: suitable for 01 Studio 1.77 inch LCD display 2.4 inch LCD interface: suitable for 01 Studio 2.4 inch LCD display Temperature sensor: Temperature and humidity sensor: Sensor interface 1: 3P anti fool interface for external sensors Sensor interface 2: 3P anti fool interface for external sensors Communication interface: 4P anti fool interface for external UART/I2C equipment Lithium battery charging circuit: charge the connected lithium battery (red light charge, green light full charge) Material: PCB+Metal colour: Black Package Contents: 1 x pyWiFi - ESP8266 development board 1 x pyBase 1 x 0.9 inch OLED 1 x USB cable 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.