DX-CP26 RS232 to Bluetooth Wireless Serial Adaper Converter Support IOSAndroidWindows Suport DB9RJ45 Interface Built-in rechargeable lithium battery (CP26 for PC)

4 Stars because these devices are paired in the factory, if you lose the receiver there is no way to get another one paired to it, "DO NOT BUY A RECIEVER" they sell them but they are USELESS. Also mark them up if you have more than one :-)

Looks very neat but instructions are incomprehensible and very sparse. They and the software, once you find it, are largely in Chinese and don't tell you anything useful. After several days trying to get it to talk to my Android software I emailed for help - no reply. I unfortunately eventually gave up in frustration and asked for a refund. Another company, DSD Tech, produce a similar product, unfortunately with the same issues. It would probably work if it was possible to find out how to use it.