Review on 🌬️ TianNorth 4000mAh Battery Operated Fan: Powerful 7-inch Desk Fan with 135° Vertical & 90° Horizontal Rotation - Portable Clip-on Fan for Bedroom, Tent, Beach, Treadmill, and Car by Lakeisha Smith

They have decent performance but if you buy them because they are oscillating fans. Not! These things don't sway very well, if at all. About three of them. Aside from the one that had the buttons broken when I got them, the other two didn't wobble at all when strapped to the rack and barely wobbled when flat. I don't know why it's so hard to find a working little vibrating fan but gosh this looks like my 7th or 8th attempt to buy one from Revain that was returned because the generation didn't work. Two of them didn't even come with a short white charging cable. I'm not sure why companies think a 3ft cable is enough for everything.