Parameters:Brand: Springos® Color: black-gray Material: PP, TPR, steel Resistance adjustment: 10 - 100 kg Move counter: yes Dimensions:Length: 16.5 cm Width: 12.5 cm Thickness: 2.2 cm Shoulder length: 9/10 cm Arm spacing: approx. 9 cm Spring diameter: 17 mm Additional information:Adjust the resistance using the knob The movement counter shows how many times the squeeze has been performed - electronic counter with a liquid crystal display, reset by pressing the button on the bottom of the handle Anti-slip handles Power supply: 1x LR1130 coin cell battery (included) To replace the battery, pry the meter out of the handle and then unscrew the cover (a small screwdriver is needed)