Mlayer speakers can used for earphones,with high sound, sensitivity.16Ohm. 7MM, conform with ROHS. Product Name: Rasio,mp3 mylar speaker with low priceModel No: BTX-8TK-16Ω Speaker Size: 8mmImpedance: 16ΩRating power: 5MWWe can produce different size of the earphone, aslo can OEM as your detailed need. Rasio,mp3 mylar speaker with low price