CUI's CDM series ranges from 10 mm to 20 mm in diameter with depths as low as 2.9 mm. CDM series features include Mylar cones for increased durability, spring contacts for ease in manufacturing, and metal frames. Sound pressure levels range from 72 db up to 78 dB at 1 meter. Input power required to drive the speakers remains low and ranges from 0.2 W to 0.5 W. All models are RoHS compliant.