This Alfa is my personal favorite, it hasn't let me down in the 5+ years I have owned it.

This Panda is great if you want something more discreet.

https://www.amazon.com/dp/B004Y6MIXS/ref=cm_sw_r_cp_apa_fabc_462HK0987DJJBE59B9P8?_encoding=UTF8&psc=1

Best for the money, and most reliable in my experience