Check the listing for details. 4 Pcs 8 Ohm Small Speaker, 1W 57mm OD Metal Shell Round Magnet Tiny Speaker. Condition: New. Listed at 13.53 USD. What is this?8 ohm speakers are widely used in mini speakers, music players, multimedia speakers, doorbells, computers, etc. Suitable for mini speakers, music players, doorbells, computers, multimedia speakers, DIY electronic toys, radios, and walkie-talkies, multimedia speakers, etc. Its compact size makes it good for DIY electronics projects, portable audio players, and other space-constrained applications.What will I get?Diameter Micro SpeakerImpedance: 8 OhmsPower: 1WTerminal: Pre-soldered 1.25mm plugWire length: 100mm/3.94inchOverall size: 57x13mm/2.24x0.51inch(OD*H)Magnet bottom diameter: 18mm/0.71inchPackage Includes: 4 Pcs x Mini Speakers (Black)Are there any advantages?The round metal casing is durable and helps concentrate sound waves; the built-in ferrite magnet ensures good sensitivity and clear audio output.