I would say for your first time purchase into the whole stroker scene while not going to deep would be the Handy as while being easy to use out of the box, it can go deep into what you can use it for with a bit of effort and some DIY. As some games have been modded to be use-able with it which with just getting an Stanly Vice grip or some other hands-free method you can play porn games and get jerked off at the same time. The sleeves for it have some variance to them and you can use ona-holes through some 3D printer stuff as long as their weight and how tight they are alongside the lube you use. No Handy review link as well I personally got my Handy among some of the first I think (it’s lasted me 3-4 years with careful care and so I am biased most likely towards the Handy since I have no experience of other options) but here’s a link to an game integration which I have made a mod for said game: https://discuss.eroscripts.com/t/seal-of-lutellaria-device-integration/118974
Steps up from that which I know of are Syncbot (newest on the market) which is basically 3 points of attention which means 3 script files are needed for full experience if custom made. (Handy is just 1)
Due to it being new it has a lot of work to be done so currently while maybe not worthwhile, it should be very worthwhile after sometime. Syncbot review on this site, but there’s many on here so I suggest you read more than just this one as this is just the one I read: https://discuss.eroscripts.com/t/biased-review-about-the-syncbot/124489
OSR2+ and SR6 are what I currently believe are the best you can get on the market but are the rarest to get script wise since…they have many axis of movement, SR6 having 6 and OSR2+ having 4 I think. So for a custom script for them is I believe very time consuming but can give the most immersion. Here’s a link to a topic of someone thinking about moving on from the Handy to the SR6: https://discuss.eroscripts.com/t/sr6-questions-exploring-beyond-the-handy/117053
Finally there is an device in development that is being worked on by the same person who came up with the OSR2+ and SR6 which is basically the Handy on steroids, it’s called the SSR1. It’s I believe meant to be able to go much faster than the Handy and as a result of it being open source (I believe as is the OSR2+ and SR6 after a period of time) possible to mod and upgrade after you make it yourself solo. It’s in alpha still but possible to get however yeah…you maybe burning cash as a result. Here is the SSR1 thread I think so you can investigate it yourself: https://discuss.eroscripts.com/t/ssr1-stroker-device-video/113511
PS I believe all these above devices I’ve mentioned can work off WiFi, Bluetooth and USB connection. (Handy doesn’t do USB though, it mainly uses WiFi for script video sync though while the others do it via USB I believe)