3W 4 Ohm Metal Housing Round Internal Magnet Speaker Loudspeaker 4Pcs Product Name : Magnet Speaker;Power : 3W Resistance : 4 Ohm;Type : Internal Magnetic Shape : Round;Thickness : 5.3mm/ 0.21" Diameter : 40mm/ 1.6";Material : Metal, Plastic Weight : 37g;Package Content : 4 x Internal Magnet Speaker