2.3 cm (0.9") miniature speaker with Mylar diaphragm  and round metal basket. Thanks to its small dimensions, suitable for  signal output in equipment, where space is at a premium. Connection via  soldering points on rear side.
Technical Data:
| Rated power | 0,3 W | 
|---|
              | Maximum power | 0,5 W | 
              | Nominal impedance Z | 8 Ohm | 
              | Frequency response | 420–20000 Hz | 
     
                        | Mean sound pressure level | 79 dB (1 W/1 m) | 
              | Resonance frequency fs | 750 Hz | 
              | Voice coil diameter | 10,4 mm | 
              | Height of winding | 1,5 mm | 
              | Cutout diameter | 21 mm | 
              | Net weight | 0,004 kg | 
              | Protective system | IP 64 *) | 
              | Temperature range | −25 ... 70 °C |