Dynatron Soundhead for Solaris Plus & 25 Series - 2 cm_The only Ultrasound devices in the industry offering 1, 2, and 3 MHz frequencies for the greatest flexibility in depth of treatment. Soundhead is compatible with Dynatron Solaris Plus, Dynatron 25 Series combo units and the portable Dynatron Ultrasound unit. Patented three frequency ultrasound 1, 2, and 3 MHz available to offer the greatest flexibility in depth of treatment. Additionally, the unit offers the benefit of head warming. At less than 2