user32126: I was actually thinking to buy a cheap HC-05 module while I was searching I found a similar (think so) module It say it is a replace for HC modules. 
Is it compatible with Arduino Nano and will it work same as the HC-05 module ????

user23644: In theory they are the same and have the same capabilities. Practically they are not. With SPP-C you get twice the headache for half the price as for HC-05. In had to find it out the hard way Sending data using Bluetooth SPP-C Module without a Breakout-Board. I tried both SPP-C and HC-05 with and without breakout boards finding the same issues. So if you are willing to spend time, risk your project and save some money then use SPP-C. Otherwise use the well known HC-05.

32126: <p>I was actually thinking to buy a cheap HC-05 module while I was searching I found a similar (think so) <a href="https://m.aliexpress.com/s/item/32616503772.html" rel="nofollow noreferrer">module</a> It say it is a replace for HC modules. </p>

<p>Is it compatible with Arduino Nano and will it work same as the HC-05 module ????</p>
 23644: <p>In theory they are the same and have the same capabilities. Practically they are not. With SPP-C you get twice the headache for half the price as for HC-05. In had to find it out the hard way <a href="https://arduino.stackexchange.com/questions/26873/sending-data-using-bluetooth-spp-c-module-without-a-breakout-board">Sending data using Bluetooth SPP-C Module without a Breakout-Board</a>. I tried both SPP-C and HC-05 with and without breakout boards finding the same issues. So if you are willing to spend time, risk your project and save some money then use SPP-C. Otherwise use the well known HC-05.</p>
