All I can say about this company and device The Phoenix is that it supposed to emulate expensive machines that generate a shock wave which most Chinese products do not even though they say they do produce a shock wave acoustical wave. Most Chinese machines produce a radial wave which is more diffused and penetrates less on the tissue. Only concentrated shock waves produce angiogenesis or the stimulation of more blood vessels. Radial waves are very ineffective or useless for this according to published ED studies in Public Medicine. In fact all studies that show some positive effects on ED are producing shock waves not radial waves and there are probably 2-3 machines maybe 4 that are used in these studies and all others are not considered effective. Some people say that most Chines made acoustic waves have positive results but not according to medical studies. In so far as The Phoenix, it is a mechanical "jack-hammer" that simulates or produces an acoustic shock wave and not a radial wave. The inventor of the Phoenix went into a legal disagreement with a private clinic Novus now Launch Medical in California in selling The Rocket which later became the Phoenix and also Gainswave which produces high quality medical equipment for treating ED. All 3 entities came into a workable selling agreement in November of 2020. By legal agreement they had to change the name to The Phoenix.
The problem is that Launch Medical is a medical clinic treating ED using expensive machines and either selling you the Phoenix after you receive their clinical treatments of $3000. If you want to buy the Phoenix it is about $850 ONLY SOLD ONLINE.  You will find several web-reviewers on the internet that promote the Phoenix and if you place an order through them it goes directly to The Phoenix website where you insert a discount code for about 15% off and the "reviewer" gets a commission. This way you will only get good reviews since otherwise you will not buy and they will not get a commission. Furthermore if you go to The Phoenix website you will find many reviews supposedly from people that bought it. The bad thing is that ALLL THE REVIEWS are positive 3-5 STARS. I placed a review of 1 star and it never appeared, meaning that you will not find negative reviews since they are not posted by the website or the web service they use. Video reviews in the site are probably people that have been compensated in my opinion by a discount or commission as my opinion since there is no disclosure on any of this things.
If you actually go to their office in Southern California it is a "closed office" with no on duty personnel and no name to identifying them as The Phoenix company. When I inquire about this, trying to purchase on-site at their physical office, I was told by e-mail that they don't sell from their office only directly from their website. The office is probably a product depot or a part time office to process e-mail orders but it is closed doors so hard to say what is going on there. During November 2020 they had a Special of 30% off on The Phoenix for Black Friday. Meaning that the $850 would drop to $595 plus Tax if applicable. They then published an e-mail saying they would extend the Black Friday Deal until December 15 if I can remember correctly and their website automatically gave you the discount for 2 days AFTER Black Friday (The following Monday & Tuesday). However, the discount disappeared prematurely as of December 5 . 
During the month of October & November they had a "live Chat Service" on their website for inquiries. I asked a few technical questions on the wave generation capability of the Phoenix and the Chat Representative told me he did not know but would refer the question to their technician and they would respond to me by e-mail. They never contacted me again. Sometime in late November the website no longer has a Chat Service activated. Maybe they did not want too many questions, maybe they did not want the expense of having an additional person, who knows. I think it is a pity how this company treats and plays with the customers, because I would give them the credit that the product is somewhat effective. If you write to the company you will be writing to Launch Medical a small clinic that has no interest in selling you the Phoenix but rather in signing you up for their series of ED treatments at $3000 and selling you the Phoenix device after the treatments or using The Phoenix device as a promotional tool for their in-clinic treatments. If you tell them you just want to buy The Phoenix without the treatments then they will send you to the website. Launch Medical also offers P-Shots which is a procedure where they take some blood, spin it in a centrifuge to concentrate the cells and proteins and re-inject it in your penis. Most ED clinics have this service but there is no medical research that points to any effectiveness in this. Do your research to verify this. For the clinics it is an easy way to make money with almost no to little risk to the patient provided the injection technique is done appropriately. The idea of the P-shot is to send rich nutrients and stem cells to the penis for angiogenesis, formation of new blood arteries giving you better penile circulation and thickness. Some patients & clinicians claim it works but not according to most medical literature. The best "new" treatment is shockwave acoustic therapy but not radial acoustic therapy that is used for muscle & joint inflammation.

PS. This is my opinion and is not meant as a medical advice or consultation. The reader should always consult with the appropriate medical physician on any health issue and do their own due diligent research.

I do find that regarding treatment schedule it varies quite a bit depending on the manufacturer's model. I guess it depends on the measurements of how much energy is delivered at the tip of the device , how wide (or  focused) is the wave generated at the tip, and then there is no established or standarized protocol BUT THERE IS AN AGREEMENT OVERALL as to what should be safe and effective. Rather than a precise amount of energy, pulses and penetration which would vary by the device they generally agree on 2 times per week for 3 weeks then stop = a total of 6 treatments. Maybe take 1-2 weeks off then resume IF NEEDED 6 more treatments. That would be a total of 12 treatments. Then stop ,another break and 6 treatments more if needed for a total of 18 treatments. Continued treatment may not be advantageous if little improvement is shown and one must consider other components of ED as well such as testosterone levels, psychological problems, stress, lack of sleep, nutrition, etc. Shockwave therapy is only addressing atherosclerosis of the arteries within the penis. The implication here is that there is a correlation between ED caused by atherosclerosis and heart disease or atherosclerosis also occurring in your heart, and other arteries in the body. In fact ED caused by atherosclerosis is a warning sign for arteries being clogged elsewhere in the body. The best course of action is ....diet change to a more vegetarian diet, lower cholesterol levels, lose weight (since fat accumulation impacts testosterone levels) and follow up with whatever ED treatment works for you, in this case shockwave therapy.  This is what I read overall, but one should always consult a physician for appropriate medical treatment.

TC wrote:

Here are a videos on shockwave vs radial wave devices. This is from a clinic but what he says is consistent with research papers that I read and manual usage on "expensive machines" used in clinics. I'm not saying that radial is useless but it is not what is used in most if not all ED studies. Apparently the burst and short time of the energy transfer from the tip of the device to the penis is important to deliver the stimulus necessary for increase blood flow and probably dissolving atherosclerotic layers or having the tissue remodel the inside layers of the arteries.

1)https://www.youtube.com/watch?v=feAke2Fz7ZE

2) This one talks about in general focused shockwaves vs radial . Radial usually used for tendons/muscles. Focus shockwaves for deeper tissues but also for penile used (talks about it around timeline 5:00 )
https://www.youtube.com/watch?v=-zCkNKcMD7k

3)https://www.youtube.com/watch?v=Mloh889UC40

4)https://www.youtube.com/watch?v=K1gVh6WgedQ

TC, look at my latest post on shockwavefored.blogspot.com where I discuss and debunk some of the information in these videos.

Dick