Supports Wi-Fi and Bluetooth 5 (LE) Flash: 8MB Supported development platforms: for Arduino, ESP-IDF, VS Code Adapt to RS232 DB9 female interface, DC input 7V-24V Onboard functions: WS2812, Button: Reset + Boot + 102 Type:Bluetooth,WIFI MCU:ESP32-S3 Full-duplex high-speed RS232 module Module Name:RSM232MT5V Isolation voltage:3000V Port:TTL/RS232 Isolated output:5V/50mA 0.5W Communication rate:1200-256000bps The product appearance and printed words may vary depending on the batch, but this does not affect use. The circuit board printing is slightly different, which does not affect the use. Colour:Black Material:PC Package Contents: 1 x RS232 module 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.