Query related to third party products

[Newbie]

Hello, I am referring to this link www.nordicsemi.com/.../3rd-Party-Bluetooth-low-energy-Modules

and I am referring to Xuntong PTR5518 11 15x15x2mm PCB China product on the link. Now I want to buy the same product from
www.aliexpress.com/.../1705282663.html

My doubt is product available on the link says it is ble 4.0 and not ble 4.2. So I am confused if it is ble 4.0 or ble 4.2. I want to buy ble 4.2 based nrf chip. So should I buy that?

2. I came across this link www.nordicsemi.com/.../Nordic-powered-Bluetooth-Smart-module-simplifies-development-of-wireless-wearables-toys-and-smart-home-solutions and want to know can I use this third party device but problem remains same as it says it is ble 4.0. It works on At commands so my doubt is can I use my nrf code for example ble_app_gls code with this module by using swdio swclk pins?

Thanks, Shailav

[Petter Myhre]

I don't know which revision of the nRF51822 that is inside the module, you would have to ask the manufacturer about that. In this you can see that revision 3 supports the latest SoftDevices, which are 4.2. That said that doesn't mean they support all 4.2 optional features. What specific features do you need?

As long as you have access to the SWDIO and the SWCLK you should be able to program the chip with whatever you want.