Hoyer Quick Fit Deluxe Sling Small Hip Knee Post Surgical Prdct pulse rate error is ±2 Color:Red pulse rate error is ±2 bpm or ±2% (select larger) MyoTrac packs extreme sensitivity into a light compact unit that works for you and your patient in the clinic or home * It is ideal for clinical assessment as well as for self training * MyoTrac allows total freedom of movement for ambulatory exercises and provides a bright light bar and proportional tone biofeedback * The unit is accurate and reliable * MyoTrac offers three sensitivity ranges for muscle strengthening rehabilitation or relaxation therapy and provides stable readings in less than a second * Features: The highly sensitive MyoScan active sensor needs no skin preparation Two modes of biofeedback LED and 5 way tone provide flexibility 5 way tone feedback includes proportional above and below threshold and 4 second delayed alarm 13 segment LED bargraph offers expanded range for precise visual feedback * Wide and narrow bandpass filters provide precise monitoring of normal and fatiguing muscles and eliminate heart beat artifact 0 to 2 Volts DC output allows to connect to third party equipment and permits computerized monitoring * Low current consumption provides long battery life * Weight: 2 lbs Easy to fit general purpose sling designed to suit 85% of residents * It is simple to use *