It offers safe, convenient & highly effective pain relief when you need it most. The Tenscare Sonic Stim is incredibly versatile as there are several ways in which you can use it; it can be used primarily as ultrasound only, TENS only or as Ultrasound & TENS combined for instant relief of muscular & joint pain depending on your individual needs. Tenscare Sonic Stim Ultrasound & TENS Machine Features Ultrasound therapy only programme at 1 MHz 7 Combined ultrasound programmes 7 TENS only programmes (2 TENS electrode pads)1 MHz ultrasound with a maximum power of 4w, max Pulsed ultrasound with 5 intensity levels; 5%, -20%, -50%, -80% & -100%TENS unit with preset programmes that range from 2 to 150 Hz output. Mains powered & comes with a 15V safety medical power supply adaptor Medical device certificate CE0123