Mini speaker!: 1).patent product, 2. made of pp or cardboard material. 3. used by any ipod or mp3 which with 3.5MM plug Mini speaker:Specifications: The speakers are passive speakers, the sound quality and volume depends on the music devices you connect to. We suggest you connect the speakers to IPHONE, IPOD, IPAD, MACBOOK and other Apple devices because the amplier inside Apple devices are more ...