Records in pounds or kilograms. Measures peak force and time to reach peak. Stores data in on-board memory with browsing capability for up to 52 trials. Automatic calibration routine verifies calibration at 0, 25, and 50 lbs. (0, 11.4, and 22.8 kg) and assures consistent reliability. Variable trial length of 1-10 seconds can be set in 1 second increments, and audible tone cues user. Tester comes with three interchangeable easy-to-clean molded plastic stirrups with pads. Uses one lithium battery with a life of 80-85 hours, and has low battery indicator (unit operates 10-12 hours after indicator activates). Battery included. Size: approx. 3" x 4" x 1.5" (7.5 x 10 x 4 cm). Weight: approx. 10 oz. (260g).