Feature●Product Name : Magnet Speaker, Power Supply: 0.5W●Resistance: 8 ohms; Type: Built-in magnet●Shape: Round, Magnet Diameter: 16mm●Size: 36 x 4.8mm (D*T); Material: Magnet, Metal, Plastic●Weight: 1.2 oz (33 g); Package Contents: 4 x Internal Magnetic SpeakerDescription