Measure your vertical jump easily and conveniently with the Tandem (R) Wall Mounted Vertical Challenger. This vertical jump tester attaches to the wall with minimal effort of your part. This training device can measure any vertical jump between four and twelve feet. FEATURES: Vertical jump tester in a convenient wall mounted version Easily attaches to the wall for quick and convenient use Can be positioned flat against the wall for easy storage Capable of measuring vertical jumps from 4' to 12' Manufacturer's warranty: 1-year limited For additional information relating to the Manufacturer's Warranty, please contact 1-800-766-1098.