I was given this in exchange for a fair and honest review

https://www.youtube.com/watch?v=yzAIZL59H_U

"Ultimate Item Detector"

UID is a very limited edition effect from Secret Factory. Only 55 sets ever made, once they are gone, they will never be available again!

UID allows you to perform 'which-hand-type' effects in a super clean way.

Unlike other products UID can be performed at a distance from the spectator and not just closeup.

UID has 2 modes; Magnet detecting and Movement detecting:

In Magnet detecting, you let your spectator hide a coin in one of their hands, and you guess which one it is in with 100% accuracy.

In Movement detecting, you can place UID into many other things, for example in a card case! And you can know whether and when the card case is being moved or lifted from any table or surface. You can even put UID in napkin, make a napkin ball, then use it to perform which-hand effect or sync effect. Think of all the effects you can do with Movement detecting (Which hand, Three things game, Sync raising hand, etc.)! You can create a lot of mentalism routines.

UID comes with detector, receiver, arm band, usb micro charging cable, strong magnet half dollar plus download instructions

Get yours for $275 https://www.hocus-pocus.com/magicshop/

But you have omitted to deal with the movement detection aspect. A which hand, heads or tails effect can be achieved with the smaller '6th Sense' by Hugo Shelly and with the 'hidden in plain sight' Flux by Promystic. Both work extremely well and cost less.
The UID comes in two parts because, with one part on a third party and the other with the magician, a 'which hand' effect can be achieved at distance, for example across the room.
This 'distance effect' is also available using a quality Promystic product called 'Finders Keypers' (albeit that is more expensive).
To summarise, the UID alone combines both functions. It just remains to be seen how cost effective, pound for pound, that is compared to the above-mentioned products.

Should have said that my comment about movement detection related to your video review.