Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Hi, ( Lasko 4924 Blower Fan) Are power & settings manually controlled/ knob ( not digital)? need a manual fan so can use w/ an external weekly timer
Document: All 3 fans had 3 output settings (low/med/high), and I measured their power usage to be:HVB - 95/103/111 wattsHoneywell - 32/36/40 wattsWind Curve - 37/41/47 wattsNoiseI used an SPL meter app on my iPhone to measure how loud each fan was at each of those settings. All of the fans were tested in the same spot and the iPhone was placed on a stand about 5 ft away, in front and slightly to the side of each fan, so that wind noise didn't factor into the measurements:HVB - 59/61/64 dbHoneywell - 50/53/55 dbWind Curve - 46/49/51 dbAir FlowI don't have a way to measure each fan's output objectively, so these are my impressions:HVB - Lasko wasn't kidding when they labeled the 4924 with the acronym HVB for High Velocity Blower.
I have central AC, but my home office is typically a few degrees warmer than the rest of the house. I decided to add a fan to help cool the area off, but I wanted the quietest fan that did the job. I ended up ordering the following three fans through Amazon for comparison:-Lasko 4924 Space-Saving High-Velocity 3-Speed Oscillating Blower Fan(HVB)-Honeywell Digital Tower Fan with Remote and Ionizer-Lasko 42 In. Wind Curve Tower FanI'll start with the quick summary for the TL;DR crowd.
I needed a replacement fan to replace my old and creaky Hunter fan and I looked at the options both local and Amazon. Through the confusion of similar models, wide variety of prices and so on, I looked for simply good ratings. From there I narrowed the search to ones I could afford and ended up with this Lasko model.As one might guess from its non-standard profile, the Lasko concentrates on one thing: a strong comfortable airflow. If you need a fan that can blow a strong cool breeze (in 3 settings/strengths) and oscillate, buy this fan.If you're looking for bells and whistles - a remote control, a UV filter light, etc, you're looking in the wrong place.
this is HIGH HIGH speed, like it says, it does what is says, but the problem is,there isn't any really low speeds, the low setting blows like a hurricane and is so noisy we couldn't hear the TV, our baby cry..or anything..if this had some lower settings,it would be great, but this isn't for everyone, use this for high power, that's it.
This fan really moves the air, iit is quiet, durable, and it's price point is just right. What's not to like? I really like my Lasko 4924 High Velocity Blower Fan. It is the best.
Lasko makes several floor fan models. You can see most at places like Bed Bath and Beyond. But this model, the 4924, is the best of the bunch. It has an industrial design, massive air intakes on the sides, and can cool a room almost as well as a small A/C. For offices and rooms measuring about 20x12, this is a great product. I've compared it to the sexy Dysons and Vornados, and it does a better job for the money. The "low" speed on this thing is faster and more powerful than most table fans "hi."
Well, a few years ago I ordered a Lasko Pro Blower (turbine) Fan, which I've been very happy with. Ugly, yes, but THE best fan...ever. I needed another fan for a different room, and saw this model 4924. At least I kept the original packaging... so I can send it back, or I might stick it in the alley with a "free, hardly used" sign.
Our purchase of two Lasko 4924 fans has been a real success! They produces considerable 'wind' power without making our lives miserable with loud sound. The silhouette proves attractive in living room as well as family room areas AND when fan isn't needed, it is easy to move and fits easily in an unobtrusive area of each room.Our purchase through Amazon, was uneventful and speedy which has been typical of all the business we have done with Amazon. We have never had to return a purchase, but many reviews that I've read have applauded Amazon for ease of return.
But since the Honeywell uses colder air for cooling while the Lasko uses high velocity air for cooling, the Lasko makes more noise.Remote Control: The Honeywell includes a very nice extra feature of a remote control that is missing in the Lasko fan. I have found the remote control to be a wonderful tool as I can alter the fan's setting quickly and easily anytime I want. Sometimes I will change the settings if I'm drinking something cold which chills me for a few minutes. I use the remote control every day because it's just so convenient.Dependability: I have owned both fans for at least two years and have found them to be highly dependable.
There's a separate push button that turns the oscillation on/off. There's no remote, no timer, and no ionization function.The Honeywell has digital controls and comes with a remote. There's an LCD window that shows the air temperature, fan speed, and timer. It has one nice ability that neither of the Laskos have, and that's the ability to turn on/off at a preset temperature, just like the HVAC system in a home. Although the controls are all digital, half of the six buttons have shared functions.
Answer: They are manual settings.  lo, med, hi.