JAXJOX DumbbellConnect™ - Adjustable Dumbbell Pair - Cool Gray

Really amazing dumbells and wonderful design. Best adjustable dumbells I've used thus far. The fact that it's electric is something to consider when buying. If the lights go out, you won't be able to change the weight. But that's not a concern of mine. The weights change pretty quickly, about 5 seconds max to go from 12lbs to 50lbs. The only reason I'm giving it 4 stars instead of 5 is the fact that all the cool aspects like rep monitoring and stats require a $12/mo subscription to their app service. I guess I overlooked that when reading about this, but it was a bummer to see. I would understand a subscription to see their workouts, but to pay additionally for something that was the main selling point for an already expensive 'smartbell' (these ain't dumb) was very, very disappointing.

1. Solid unit. 2. Was able to get connected and running in minutes. Have the app installed and turn on the bluetooth on your phone as well as in the app. 3. Build quality is good, besides the plastic around the handle and base. 4. USB cables are long enough as these units project to have a long battery life. 5. Rep count works, but the apps integrations are limited. Check out my quick preview. More detailed review to come. https://youtu.be/ak9YlEIyrbU

Poorly designed. Base does not hold weights straight so its impossible to drop dumbbell into the base and connect both of the left and right set of weights. (One side tips away from the dumbbell and does not connect properly when you put the dumbbell into the base. If you try to align the far side than the first side no longer connects. You can use one hand to straighten the weights properly and then use your other hand to drop the dumbbell into place. This is a problem when you are trying to place two heavy dumbbells at the same time.) One handed, your dumbbells constantly drop into place with a broken connection to one side of the weights. Too expensive to be so poorly designed. It wouldn't take much to redesign a base that holds the weights correctly, rather than letting them tilt so far side to side. I imagine they will have to do a redesign next year to fix this. I would definitely wait till then when the product is ready. The app is kind of cool how it can track total reps and weight. But currently it constantly confuses picking up the bells from the base and walking around the room as multiple double reps. Literally half of your reps will be incorrectly counted as 10 separate double reps that weren't reps at all. So doesn't really work in practice.

My son loves these weights, and they take up much less space than a set of weights!

One the two bases doesn't turn on not even when it is connected and the bases construction feels very fragile.

As much as I want to recommend these dumbbells, I just can’t. There fantastic to use and the concept is great but there’s a TON of problems here. It’s all plastic, nothing is built to last here. One small drop and these would break if you’re lifting heavy. These dumbbells have sensors underneath them so they can sync with the the base. This is a huge flaw IMO. Rub these dumbbells to hard on the ground and that’ll probably damage the sensors making the whole product useless since you can use them any other way. The base also have pins that connect with the sensors on the dumbbells, how long till one of these pins eventually wears out the sensor of the dumbbells? It all feels fragile there. There’s no stand, which means you’re gonna have to find an after market one since the only stand they offer is almost $2k because it has a screen attached to it or you can skip all these options and just bend down to pick it up potentially hurting your back. These dumbbells are very big too so you’re gonna have to find a really big stand to fit these. The base is plastic and weighs nothing, use more than half the weight that they offer and you’re taking the base with you. How does something like this go unnoticed? The app isn’t really accurate for me so I just don’t use it all making that feature useless. There’s been many situations that the dumbbells just stopped working, screen would be on but the buttons wouldn’t work. I would have to either reset them or plug them in (even though they had full battery) to get them to work again. This really feels like a rushed out product because I could not find ANY info about these dumbbells, no reviews or anything not even from the company themselves. manufacturing warranty is only 1 year as well, I don’t see these lasting that long if you’re using them frequently. This product was really made for people who don’t lift often and lift very lightly when they do with gentle workouts. (Nothing wrong with that) If you’re one of those people, get this. If not, look somewhere else, some better options are Powerblocks Or Nuobell dumbbells.

Really cool, space-saving, operate as expected - and even though they are expensive, some of the other top brands are as much as this for only one dumbbell which is absurd. The only reason it doesn't get five stars is because you have to sign up for their subscription plan to finish the app setup. It's a trial, so you can immediately cancel it without cost, but still annoying. I have no intention of using their app for exercise, but probably need it for any firmware updates which come along.

These are awesome, I was skeptical as the price is about $200 less than I would expect for something like this but they did not disappoint! The way they adjust they are only as large as they need to be unlike other adjustable dumbbells that end up being the same length regardless of weight. The app made it seem like you have to subscribe to use it at first but you just have to back out and then sign in after setting up an account. Only issues I have is you have to be somewhat careful when putting the weights back into the base to make sure they line up properly (relatively minor issue) and they don't make a separate stand for them other than the whole interactive studio thing. Unless you are looking for one of the rare adjustable sets that goes higher than 50 lbs I doubt you will find a better setup than this... and yes it came with two of them.