This is a very convenient smartphone case and key case that can be attached to a school backpack. It's a key case with a reel, so you can take your keys in and out while wearing your backpack, and you can quickly take out your keys at the entrance. Also, it can be attached to the shoulder strap with a swivel hook and Velcro, so it won't fall off easily, which is reassuring. It can also be attached to other bags. This is recommended for smartphones in silicone cases, etc. - Buzzer and neck strap are not included. If you would like a matching neck strap (+500 yen), we can make one if you contact us in advance. - The reel is attached with a double ring, so if it breaks due to over-pulling, you can replace it with a commercially available one. 【Size】 Approximately 16cm long, 8cm wide, and 2cm deep 【Material】 Water-repellent laminated fabric, etc. (Not completely waterproof) 【Notes】 We have some items already made, so we can ship them immediately. However, if they are sold out at events, we will need time to make them. If you are in a hurry, please let us know in advance for a smooth process. Thank you for your understanding. 【Other】 - Please note that handmade items may have slight variations in color, pattern, and individual differences. - If you would like gift wrapping, we will wrap it for free, so please let us know. - For bulk orders, please contact us. - We inspect the items before shipping, but if there are any defects in the metal fittings such as the swivel hook, we will respond immediately (within one month). - We cannot be held responsible for damage to your phone or loss of keys due to defects in the metal fittings, so please be sure to check them before attaching them. - We have confirmed the size of the above models, but there may be changes in the manufacturer's specifications, so please be sure to check the size of your device. School Backpack