Amazon.com: USB to DB9 RS232 Serial Adapter Converter Cable with FTDI Chip 6ft Support Win10/8/7/XP/Android/Mac/Linux/Vista (Type C to DB9) : Electronics
Bluetooth Serial Adapter RS232
Serial Bluetooth Smart® Adapter - RS232
Bluetooth Smart Serial RS232 Adapter Low Energy 4.1 BLE V2
WIRELESS RS232 BLUETOOTH SERIAL ADAPTER WIRELESS 528164928119 | eBay
Mettler Toledo® 30086495 Paired Bluetooth RS232 serial adapter ADP-BT-S for wireless connection
Bluetooth Serial Adapter RS232
AliExpress
Serial Bluetooth RS232 adapter
Android Micro USB to DB9 Serial Adapter - Serial Cards & Adapters | StarTech.com
Amazon.com: DSD TECH SH-B23A Bluetooth 2.0 to RS232 Serial Adapter with DB9 Converter : Electronics
Bluetooth Serial Adapter RS232
BT578 V3 RS232 Wireless Bluetooth Adapter Male and Female Heads USB to Type-C power charging - AliExpress
BT v2.0/2.1 Serial adapter SMA - SRP | TOP-electronics
Serial Bluetooth RS232 adapter
Bluetooth Smart® Serial RS232 Adapter - Low Energy 4.1 BLE
Serial Bluetooth RS232 adapter
IOGEAR - GBC232A - Bluetooth Serial Transmitter
Serial Bluetooth adapter with RS232 interface
Bluetooth RS232 Class 1 ADAPTER ONLY | TOP-electronics
Amazon.com: SystemBase - RS232 to Bluetooth Adapter, Class 1, 100m, Serial to Bluetooth, 2pcs/Pack (WCS-232 v6.0) : Electronics