COMPATIBILITY:For Zebra TC21, TC26This offer is for a "twin pack" of hand straps. You get 2 units. The straps were designed to be compatible with the Zebra TC21/TC26 mobile computer/scanner. If youre regularly scanning items, this strap will come in "handy." Get a grip on your device! EASY INSTALL: Thread both ends thru the corresponding slots on your TC21/TC26. FYI, this strap is also compatible with our cases for TC21/TC26. CONVENIENT: Now you can relax those hand muscles while keeping your device secure and accessible. The hand harness is also a good investment because it helps prevent those accidental drops. ADJUSTABLE: The hand strap has a simple design with no complicated snapping components. Both ends use hook-and-loop straps for adjustability to accommodate various hand sizes. COMFORTABLE: Vegan leather material with reinforced stitching; Enjoy better grip in comfort. COMPACT: The strap is 13" long. After you thread thru both ends yous have about 6" to 7" pocket for hand. Adjust the strap according to your preference. COMPATIBILITY: This was designed for TC21/TC26. Also fits our cases for that model. This is not a "universal" item but it can be used with other devices if you have two locations to thread/loop straps.