The CM-100 is a system for measuring bone density using ultrasound.The speed of sound in bone (SOS) is believed to be related to bone density and characteristics , and it is measured at the heel bone.Since it is compact and lightweight , making it easily to carry.The CM-100 has excellent performance , with short measuring times and easy to operate , making it ideal for primary sceerining , such as group examination. The CM-100 includes a printer as standard , and so the system can be used as a stand-alnone unit .An optional computer can be connected if erquired , and this allows remote operation and control of measurement data.