This is an EMS training gear for the lower body and thighs from SIXPAD, which Nao was a model for. It was incredibly effective for lifting my hips! Buttocks Training Efficiently targets the three muscles needed for hip lift: the gluteus maximus, gluteus medius, and hamstrings. I used it a few times after taking a bath. My buttocks lifted, and I was satisfied, so I stopped using it and put it away. I'm selling it to someone who is interested. I will send it with the gel pads attached. There are also plastic sheets to protect the gel pads. It's size S. You can use it regardless of your size if you use rubber bands, etc. The size is for the extension belt with Velcro that comes as an accessory, so the main unit is the same size for everyone. Please check the official website for details. I bought it from the official website when it was released. I remember it cost around 42,000 yen. It also comes with a charger. I have kept the box and storage bag, etc., that came with the purchase. SIXPAD EMS Abdominal Trainer, Black, with storage bag. - Brand: SIXPAD - Type: EMS Abdominal Trainer - Color: Black - Accessories: Storage bag Thank you for looking.