Mini speaker,micro speaker 1,DC 5V 2.USB power 3.RMS:6W Mini speaker, plastic speaker, mp3 speaker, multimedia speaker,USB speaker,micro speaker1. Portable Audio System designed for ... : 4 ohms8. Input power: DC 5VWe got the FCC, CE, ROHS and other international certificates and a number of Patent certificates ... no best only better, so our products are more competitive micro speaker