Saludos. Soy nuevo en microtik solo se la básico aun
Bueno mi pregunta es la compatibilidad de wifi ya q tengo un rt8187l realtek
Es posible trabajar con realtek sus precios son muy bajos
Antemano gracias
google traductor 
You can paste here text, which google translate gives you.
As far as I know such card is not supported by RouterOS.
Thank you very much for responding
There is no possibility
In my country (chile) 1000mW its value is $ 30 us
The mini pci atheros $ 60 us or more 
I apologize for the translation
Yes, Realtek tends to be a cheaper chipset and most outdoor wireless systems are specifically designed for Atheros chipsets. Unless more providers (software developers and companies) write drivers for Realtek, you’re not going to see much support.