Initially doubt because I did not know the name but optics + Price made me curious and I have no regrets. 4x75 Watt say anything and keep their promises. The choice of colors is fun because you can mode All colors. SD AUX-USB = 3x32 GB >> what man wants more! : D although I must say, it has also accepted although my max 64 Gb flash drive. 32 Gb per slot are given. CONCLUSION: Quality / Price 5 but felt 10 stars! My Recommendation! AUNA? ahhh that are the !!! I like!