Quality : best . functionality : okay no problem . The goods have arrived , the delivery from abroad is really fast , overall everything is okay , there are no damaged lights at all , the best thing is that this LED can follow the rhythm of the song , when using bluetooth with a cellphone , you can disco alone in the room , no matter what , thank you yes seller####[([0], [2], 'POS'), ([4], [6], 'POS'), ([4], [7, 8], 'POS'), ([16], [17, 18], 'NEG'), ([16], [21], 'POS'), ([32], [30, 31], 'POS'), ([42], [43, 44, 45, 46, 47, 48, 49], 'POS'), ([60], [59], 'POS')]