https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
Bluetooth RS-232 adapter-BT-232B(-E)

Bluetooth RS-232 adapter-BT-232B(-E)

Uconnect International Co., Ltd.
Region: Taiwan
Update: 02/19/2016
Key Specifications
Wireless serial port usable as a Wireless RS232 serial cable replacement. This Wireless RS232 adapter uses Bluetooth for its wireless link between devices, CNC machines, PDA, Laptop, or computer with Bluetooth RS232 adapters.

Features:

-Support Bluetooth v2.0+EDR, Class 1 (100 meters)

-Support Bluetooth Serial Port Profile (SPP)

-RS-232 Interface, Easy installation

-Battery charger and powered

-Internal Chip Antenna

-Applications: RS-232 cable replacement, Automation control, POS, Receipt printer, Medical appliances, Barcode reader and etc...

https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions