Magnetic back of a small dynamic loudspeaker with an impedance rating of 4 ohms (Ω).
Speaker Specifications
Type: Mini or small-form-factor full-range loudspeaker.
Impedance: 4 ohms (the electrical resistance the speaker presents to an audio amplifier).
Application: Commonly used in small electronics, DIY audio projects, intercoms, or portable radios.
Similar generic components (such as a 2-inch 4-ohm full-range speaker) are widely available for replacement or hobbyist electronics repair.