Ergowriter Invalid Rings Weight: 2 1 4 lbs MSHQ 530914G Weight: 2 1 4 lbs 1 SYNCHROSONIC U 50 * The versatile SynchroSonic U 50 provides therapeutic ultrasound which may be applied separately or which may be combined with electrical stimulation simultaneously through the ultrasound transducer using an external electrical stimulator * The cable fault alarm system is an added feature of the U 50 * This system will detect improper transducer cable connection and or transducer cable damage * If such detection is made an audible signal will alert the practitioner * Delivers up to 20 watts variable or non interrupted power * U50 For Use with Combination Therapy * Designed to alleviate the pain of writing associated with arthritis and other hand afflictions * Comfortably and correctly positions the thumb to reduce stress placed on the wrist * Can be used with most standard pens and pencils * Pen included blue ink * For right or left hand use *