new and high quality Made of gold-plated circuit material. 2.4g antenna, the signal is more stable. gamepad with novel and cute appearance. ESP32 S2 chip, kill all firmware. Specifically designed for 9.0.0 systems, does not support 9.03 systems. It can generate a WiFi signal, and the built-in USB flash drive be automatically mounted. There is no need to prepare a separate USB flash drive, which greatly simplifies the process and eliminates the trouble of plugging and unplugging the USB flash drive. Instructions for use: Plug it into the machine, turn it on, and connect to the module's wifi. Just go into the user guide. The wifi automatically connect to time you turn on the inflator. The batches are different, the 2 versions in the picture are randomly distributed and do not affect the use. Colour:White Material:PCB Package Contents: 5 x ESP32 S2 Key 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.