ITEM NAME:36mm Diameter Aluminum Shell Internal Magnet Speaker 16 Ohm 0.25W 2Pcs B3D7 36mm Diameter Aluminum Shell Internal Magnet Speaker 16 Ohm 0.25W 2Pcs B3D7 Product Name : Magnet Speaker;Power : 0.25W;Resistance : 16 Ohm Type : Internal Magnetic, Slim;Shape : Round Bottom Diameter : 20mm/ 0.8";Diameter : 36mm/ 1.4" Height :7mm/ 0.27";Material : Aluminum, Metal, Plastic Weight : 23g; This internal magnet speaker is designed with aluminum shell. Application: toys, digital photo frame, the electronic gifts, radio, interphone, machine learning, telephone, electronic dictionary, 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..This internal magnet speaker is designed with aluminum shell.