Cardcomputer is a card computer suitable for engineers, using M5StampS3 as the main controller. In terms of control interaction, it is equipped with a 56 button keyboard and a 1.14-inch TFT screen for display interaction. In addition, the onboard SPM1423 digital MEMS microphone can record or wake up, and it is also connected to a cavity speaker for sound playback. It is equipped with an infrared emitter for infrared control interaction with the outside world; In terms of expansion, a Grove port is installed on the board, which can expand I2C sensors; In terms of storage, a Micro-SD card slot is installed on the board, which can be used to expand storage space; In terms of power supply, the internal configuration of a 120mAh+1400mAh lithium battery (in the base) provides power to the entire vehicle, greatly improving its endurance. It includes lithium battery charging and boost/drop circuits; In terms of structure, the base contains magnets for metal adsorption, and the structural settings are compatible with LEGO hole expansion. This product is used for engineers to quickly verify design, industrial control, home control systems, and more. Colour:grey Material:plastic M5StampS3 microcontroller. 56 key keyboard. 1.14-inch TFT screen. Chamber speaker and SPM1423 digital MEMS microphone. Infrared emission tubes are used for infrared control interaction. HY2.0-4P interface, can connect and expand I2C sensors. Micro-SD card slot, used to expand storage space. Built in 120mAh and 1400mAh lithium battery in the base, providing long-term battery life. The base comes with a magnet and is compatible with LEGO hole expansion. Package Contents: 1 * M5stack Cardcomputer 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.