It's just Paul McKenna Gastric band. www.paulmckenna.com/all-my-digital-products/
But he's got a few weight loss ones. I used his smoking one 16 years ago after failing with every other method to quit them, and it worked a charm, went off them effortlessly and stayed off with no weight gain as well! So I suppose I wasn't going into it a skeptic.
Depending on your device, it might vary how you download it. I have the kindle app so I got it though my amazon and put the book and audio on my phone and I listen to the hypnosis at bed time. I seem to sleep great these days too! I was having a quite a few nights where I was wedding-stressed and it's absolutely helped with that - and feeling rested is giving me more energy during the day whereas before, I would feel wrecked and convince myself I needed crisps or chocolate to keep my energy levels up 
I got it on Kindle. you need to read the book and then download the audio. The link to the audio from the book didn't work for me by clicking but was easy enough to click and follow instructions to find the audio files.
By my calculations I've done about a weeks worth of it, because I'd the hen at the weekend so obviously I was dining out, having a few drinks and not doing the hypnosis in the room with my mum and sister.
But, my portions are much smaller- and I don't feel like I'm depressed at stingy portions, it's more like, dishing it up and going "Ooh goodness, I won't manage all that" and put a quarter back in the pan. And then many times not finishing what I have dished up.
I've no cravings still for anything. Before, the twixs in the vending machine at work would practically sing to me all day long, now I can walk past them without a bother.
I'm not scrounging for nibbles at night any more. And not feeling like I've been good all day and compelled to 'reward' myself. I just don't feel like I'm depriving myself at all. It's there if I want it and I think, yeah, might have some later if I feel like it, but end up never feeling like it! I recorded my weight at the beginning so I'll weigh myself again tonight and we will see if I've lost.
I doubt it's budged given the 2 day hen weekend but even a few kg by the wedding in 4 weeks I'll be happy enough.