The Lafayette Manual Muscle Tester (MMT) is an ergonomic hand-held device for objectively quantifying muscle strength. Tests are performed with the clinician applying force to the limb of a patient. The objective is for the clinician to overcome or "break" the patient's resistance. The MMT records the peak force and the time required to achieve the "break" providing reliable, accurate and repeatable muscle strength readings that conform to most manual muscle testing protocols. While the MMT is terrific for measuring a wide range of strengths, it's also effective at detecting minor variations as well. The MMT's interactive menu allows the user to select a wide range of options, such as data storage, test times (1-10 seconds) and choice of high and low force threshold settings. The large, easy-to-read LCD screen clearly displays all information, helping to ensure accuracy and reduce errors. Includes a rechargeable lithium-ion battery, 3 easy to change molded plastic stirrups with pads and a fully illustrated instruction manual. The MMT displays results in both pounds and kilograms. Features a dual measurement range (0-300 lbs. or 0-50 lbs.) for increased sensitivity. Unit has a weight capacity of up to 300 lbs. On-board storage of up to 150 test results with browsing capability. Fully charged, the rechargeable battery offers 6 hours of continuous use. To save battery life, unit will automatically shut-off after 5 minutes of inactivity. Available separately, optional data transfer software allows Bluetooth communication between the Manual Muscle Tester and computer.