A popular, adjustable pressure, spring activated cutaneous probe for treating or locating trigger points, acu-points, or ear points. 12.5 cm (5") long modulator includes 7.5 cm X 1 cm (3" x 0.4") diameter grooved handle and 1.8" spring loaded probe with rounded tip (does not puncture skin). The other end features a powerful 2,000 gauss magnetic ball probe (4 mm dia) which may also be used for acu-pressure and acu-massage. The polarity may be easily changed from bio-north to bio-south pole by removing the ball probe and reversing the magnets position. Includes 5 interchangeable, different strength springs,100, 150, 200, 250 and 300 grams. Packed in plastic box.