Data transfer between BLE, USB, and UART. BLE supports slave mode, master mode and master-slave mode. PC-side USB and BLE virtual serial port driver provided. Compatible with existing serial port software and tools, with no secondary development required. Supports Bluetooth host connection in Windows/Linux/Android/iOS and other systems. 2 serial port driver modes: Vendor driver mode and installation-free USB-CDC driver mode. 100m BLE transfer distance. Adjustable 8 positions of BLE TX power. Supports BLE transfer configuration and serial AT command configuration. Maximum baud rate of serial port is 1Mbps. Serial port supports MODEM signals: RTS, DTR, DCD, RI, DSR and CTS. Serial port supports 5/6/7/8 data bits and 1/2 stop bits. Serial port supports odd, even, no parity, space 0 and mark 1. Full-speed USB device interface, USB V2.0 compliant. Colour:Black Material:PCB+electronic components Different batches may have different appearance, which does not affect use. Package Contents: 1 x CH9143 module 1 x cable 1 x acrylic panel 1 x pin header 2 x 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.