Supports Wi-Fi and Bluetooth 5 (LE) Flash: 8MB Supported development platforms: for , 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 depending on the batch, but this does not affect use Colour:As Shown Material:PCB 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.