Monitor Arm Pole Strap-On Phone Tray
A 100 x 70 mm tray with 20 mm walls that straps onto the vertical pole of a monitor arm. It gives you a spot for a phone, earbuds or a remote without using any desk space. A 90° V-saddle grips poles from about 20 to 38 mm diameter. Two pairs of 4.5 x 22 mm slots take a worm-drive hose clamp (up to 13 mm band) or a 20 mm hook-and-loop strap, and a notch in the front wall lets a charging cable through.
desk monitor-arm phone-tray hose-clamp