What module should I sell good?

I have engaged in wireless communication module, given the current market module types too, have different properties, piles of hand module, so what can be called to what, from the length of the varied application areas across the smart home, street lighting control, Things, flying model aircraft, etc., can be made aircraft carrier Niubi blown out, the actual performance of small aircraft manufacturing, advertising how to play, customers do not come, only a few complaints included advertisements, my family modules far and good performance of cattle force to force ah, do not believe you to quiz ah. Contact QQ 2419542444