I bought several portable battery fans because I wanted to find and use the best one. I found him with a tiny tornado. it is practically noiseless. It also produces a strong wind of 1.72 meters per second measured at 1 foot with an anemometer. Compare this to my small Vornado 133 electric circulator (very quiet, love it and use it all the time at home) at 2.18 m/s at low speed. I can't comment on sucker because it doesn't use this feature. The Hadata fan (bought from Amazon) blows out more air at low speeds, at 2.38 m/s, but is moderately noisy. Its mid and high settings are so unbearably loud that I didn't bother to measure the airflow. The Coleman Zephyr handheld fan (bought from Amazon) creates no airflow unless it is right next to my face, in which case there is very little airflow. flow can be felt. The portable radiator fan (bought from Amazon) provides good airflow but I didn't measure it because it only has one setting and that setting is loud, it's louder than the Hadata fan. Travelon 3-speed fan produces low airflow and noisy airflow. The big test for me is: What fan will I use at a hot outdoor event based on airflow and volume (READ: Annoys me and the people sitting next to me)? tiny tornado, no doubt!