About us
We are professional maker of car audios from 2007, Professional production of Android screen upgrades for BMW, Mercedes-Benz, Audi, etc., it is our target and pleasure to provide quality and affordable products to buyers.We have our own factory and brand name Koason.We work from Monday to Saturday morning, as there is time lag between us, if your message is not replied timely , please wait for it patiently, we will reply your messages within 24 hours usually, at the weekend or holidays, it will take around 1-3 days to reply it. please understand.