A Portable Personal Worksite Fan provides both airflow/ventilation and cooling for workers. It runs off a rechargeable battery (or cord as back-up option) and is reportedly powerful enough to cool the air up to 40 feet. Depending on make/model and fan speed setting, run time can vary from 5 to 15 hours on a single charge. Some provide forward-only air flow, others allow 120-, 160-, even 360-degree oscillating and up to nine stopped positions. All offer multiple placement options (i.e., freestanding, hanging, wall mount).