Base M5GO Bottom3 is an expansion base designed specifically for the M5CoreS3, integrating an infrared emission LED and a 500mAh lithium battery. Two sets of HY2.0-4P expansion interfaces bring out commonly used ADC//UART pins, allowing for the connection of types of sensors. There are 10 programmable RGB lights (WS2812) on each side of the base, paired with frosted light-transmitting material, providing a soft and comfortable lighting effect. The bottom features a pogo pin magnetic charging interface. When attached to the charging base, current safely flows into the internal battery through the built-in TP4057 charging chip. In addition to the charging function, the pogo pin interface also brings out the main control I2C bus, allowing users to connect external expansions magnetically. The built-in magnets and -compatible hole design on the back enable seamless integration with for structures. Compatible with for M5CoreS3 Infrared emitter Programmable LED light strip 500mAh lithium battery HY2.0-4P expansion interface -compatible structure Compatible with magnetic charging base Applications: CoreS3 expansion CoreS3 IoT kit STEAM education Note:due to different production batches, there are differences in printing screen printing, which does not affect the use. Color:Blue & Black Material:plastic Package Contents: 1 * Base M5GO Bottom3 2 * M3x16 screws 2 * M3x18 screws 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.