... , HR4040, NO Phthalate 2.Back panel volume control 3.MOQ3K Features:1) Accompanying speaker for PC,MP3,MP4, and notebook;;2)Pure ... to take6) Built-in USB port for speaker chargingOur main products:Headsets, Microphone,Speaker,etc, we also handle business of mould develop ... , CE ROHS, NO Phthalate,HR4040,California Prop65,etc. Audio Engine Speaker-red Speaker System