ITEM NAME:4 ohms 3 W metal round magnet speaker 2 pcs O9N4 4 ohms 3 W metal round magnet speaker 2 pcs O9N4 Product Name: Magnet Speaker Power: 3 W, resistance: 4 ohm Type: internal magnetism; shape: round Magnet diameter: 18 mm / 0.71 Diameter: 40 mm / 1.6 Color: As shown Weight: 40 g Material: Metal, plastic This internal magnetic speaker is metal, internal magnetic type, easy to install. Application: Mini box speaker, music player, bell, computer multimedia speaker etc. Package Content: 2 x Internal Magnet Speaker Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Type: internal magnetism; shape: round.