Power off: When there is no USB external power supply, press "BUTTON C" for more than 6 seconds Or when there is no USB external power supply, set HOLD(GPIO4)=0 in the program operation, that is, to achieve power off. Features: ESP32- V3-02-Base,support WiFi Built-in 6-Axis IMU IR transmitter Microphone Buttons, LCD(1.14 inch) Built-in Lithium Polymer Battery 200mAh Extendable Socket Built-in Passive Buzzer Wearable and Wall mounted Applications: Internet of things terminal controller Wearable devices Stem education product Different batches may have different appearance, which does not affect use. Color: yellow Material: ABS Package Contents: 1 x StickC PLUS2 IoT Development board 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.