The keyes ESP32-IO expansion board is compatible with the keyes ESP32 Core board (KE0162). It breaks out all the pins of the keyes ESP32 Core board with 2.54mm pitch pins. Two rows of pins with 2.54mm pitch supply DC 3.3V for external sensors and modules. Simultaneously, keyes ESP32 Core board can by supplied power by inputting DC 7-12V voltage via DC head of shield. In addition, a DIP switch on the expansion board is used to control the power switch. Technical parameters: Power supply voltage: DC 7-12V Working current: 60mA Maximum power: 0.3W Working temperature: -25 to +65 Size: 30mm x 20mm Environmental protection attribute: ROHS Colour: red Material: plastic Package Contents: 1 x ESP32-IO Expansion Board Only the above package content, other products are not included. Note: Light 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.