CUI Inc's CDS series of rectangular micro-speakers ranges from 13 mm x 13 mm up to 20 mm x 14 mm. All models are available with and without wire leads, come in 4 ohm and 8 ohm models, and offer a variety of power ratings from 0.3 W to 1 W. SMT versions are also available for use in designs requiring reflow solder and high-volume production.