This clip-on fan is built to run for hours without a wall outlet, using a dual-cell rechargeable battery that clips onto a desk edge, bed frame, or treadmill rail for focused airflow while you study, read, or unwind outdoors. An 8W copper motor spinning a 170mm three-blade fan pushes up to 139 CFM, and three adjustable speeds from 2.2 to 3.86 m/s let you fine-tune the breeze while keeping noise under 46 dB. A fourth circulation mode automatically cycles between speeds so the airflow doesn't feel static over a long session. The clamp grips firmly onto bed frames, fitness equipment, or tent poles, and the head adjusts to point air exactly where you need it, while the ABS housing holds up to daily handling. It recharges through an included Type-C cable from a wall adapter or power bank, making it easy to top off before camping trips, travel, or a day at the office.