This is my 2nd Review in a week (ie 7 days after purchase of the AUVON TENS unit). I have now been using the Auvon Tens unit for a week and the overall results are tremendous (U-TOE-PIA) For 10 years I have suffered, increasingly, from chronic pain in my left foot. It is debilitating to the point I cannot walk for more than 100 yards. I cannot stand for more than 5 minutes. Following 3 different surgeries (2 x sesamoid bones removed and a metal plate screwed on top of the big toe to prevent joint movement. The pain is worse now than 10 years ago. Medication gives minimal relief and only subdued the pain temporarily). The AUVON TENS machine offers 20 different modes and intensities to suit personal choice. 2 x pads are placed on either side (or above and below) the point of pain. My pain is in "The Ball of my Toe", commonly called Metatarsalgia (pain in toe joint). Most people with foot pain seem to suffer with Plantar Fasciitis (arch of the foot) but no-one seems to offer much advice with "Ball of Toe" pain, and no-one has advised about TENS treatment to this area - I experimented until I found "U-TOE-PIA" (my invented slogan!). Notice how I have placed the 2 x pads in the photohraph. 1x pad on the ball of the toe and 1x pad an inch lower in the Plantar are (arch area, middle of foot). Of the 20x modes I have found that mode number 4 which is the Korean Massage works great for me. I set it to number 4 intensity (some people may prefer 3 or 5 intensity, personal choice). This produces a gentle "tingling" sensation from the big toe across the 2x pads. Utopia for me! All the modes are beneficial and range from massaging, kneeding and accupuncture. Accupuncture (mode 3) has also worked well for me. Also the Scraping mode (mode 8). They all have adjustable intensities set by each person. The timer can be set 10/20/30/40/50/60 minutes. The unit switches off after the timer has finished. I have used the smallest pads available 4cm or 5cm to make it easier to target the pain in one specific point (joint, nerve or muscle). The pads stick extremely well and are re-usable (30/40 times). I found it also helpful to wear a sock as this creates a cushion for the wires and makes the pads UNDER the feet just as comfortable. As I have a metal plate screwed into my big toe, I was dubious whether I could use a TENS machine. Before I purchased the unit, I asked the hospital surgeon/consultant if it was possible to use one on my foot especially as the unit sends electrical impulses between 2 pads. His professional answer was that "it should be ok" but he suggested using a low setting to begin with. From an obvious POV, he said switch it off if there is any discomfort. GREAT NEWS - I have used the TENS unit now for 7 days and the results are absolutely fantastic with no side effects due to the metal plate. The important thing is to seek medical advice especially if a user has heart conditions or a pacemaker fitted. (NB each person MUST use settings that are OK for that person. All I can say is that it works for me.) NB. I also tried the pads on 2 of my smaller toes and also placed on the ball of the foot. Hey-presto, It worked, but not as efficiently as it is difficult to make a great contact for the sticky pads. The AUVON TENS unit is extremely well designed and has a solid well-made feel to it. It measures 10.5cm x 5.5cm (4" x 2.3") and the display screen is easy to view and understand. This unit has 2 channels (A+ B) enabling 2 separate areas of the body to have treatment. There are 20 different modes (incl acupuncture, Korean massage, kneading etc) and many more. All of them are accessed by a solid button (up or down). There are 20 intensities (subdivided into half steps increments). Both channels can operate separately and independently and can be programmed separately into 20 modes and 20 separate intensities. All options are operated by quality push buttons. The menu is on screen and very simple to navigate. The screen illuminates when any push-button is touched and stays on for about 5-10 seconds then reverts back to normal to save battery life etc. There is no "fumbling" through instructions to activate anything. There is an easy-to-read manual and all cables and leads are included. The battery is long-lasting and charges up by a USB cable just like a mobile phone charger. Several pads are included of different sizes. I have been using the smallest pads for the sole of my feet and toes and are extremely comfortable. The "sticky" side of the pad is very effective and stays in place. The pads are re-usable. There are accessories available called conductive gloves and socks that can also be used. I have decided to try to obtain a few pairs of "conductive socks" which allows the TENS unit to be used whilst walking. I understand that many people use the TENS unit all-day at work or whilst travelling. The setting I use for my feet is usually 3 or 4 out 10. This creates a gentle tingly feeling across my foot (specific areasd can be selected). I then know that this is aiding blood circulation and massage type therapy. I know it is early days yet, but I know the TENS machine is already a life-changing improvement for me. I feel that in future, I will use the smaller pads so that I can place them on the sole of my feet. I will also obtain the conductive socks for my chronic foot pain. OPINION The AUVON TENS unit is an awesome unit. They could use my logo such as "AUVON - PAIN GONE." In my opinion, the settings are best to create a "tingly feeling" for me. I know there are some units on the market that virtually give an "electric-shock" treatment, but the AUVON is so flexible, it can give treatment in so may different ways (acupuncture, massage, kneading TENS, EMS and lots more). For the price ((about £30 UK, June 2021) it is an absolute bargain. I wish I had bought this unit 10 years ago. After only 7 days of use, I already feel much better. Much of my pain is due to arthritis, which cannot be cured. But now, I am able to walk a little more and not be in pain whilst I am wearing the TENS unit. I am sure there are many thousands of people will be able to do the same at work or walking for leisure. (NB. I my case, I am happy to use the TENS unit for several hours. Many pain sufferers may decide to use the unit for 30 minutes or an 60 minutes in the morning or during the day. Each individual should decide what suits them. I have a metal plate fitted in my foot and there are no side-effects whatsoever.) I have not been paid to give this review and I have not received any free products. The views are entirely my own, trying to be of help to other pain sufferers. This unit is suitable for anyone with foot, ankle, knee, back or hand problems. It's early days yet, but after only 7 days, I know the AUVON TENS unit is life-changing for me. My life will get even better as time goes by. Peoples ideas may differ, but I wear the TENS unit for a few hours each day, nearly continuously. I am aware this might cause muscle fatigue, but I feel Ok for now. WELL DONE AUVON (This is not a paid review. Just trying to be helpful.