Technical specifications:
Hydraulic BaseLine dynamometer with case. 2 pointers. Read in kilos and pounds up to 300 lbs.
The adjustable handle can be placed in five grip positions.
This enclosed hydraulic system offers a dual scale readout that shows isometric grip strength from 0 to 200 pounds (90 kg). Includes instructions, standards, patient registration letters, and carrying case

The indicator remains at the maximum reading until stopped.