This is a retractable neck strap, called "Petit." It's a beautiful pink color with glitter. You can customize it with Swarovski crystals or stickers. To use it, press the button in the middle and pull out the cord. The cord will come out, and you can stop it at your desired length, fitting it perfectly to your body. Press the button again to retract the cord. Do not forcibly pull the cord out without pressing the button, as this may cause damage. You can hang various items such as smartphones, kids' phones, mobile phones, pass cases, keys, ID cards, cram school entry cards, student ID cards, and employee ID cards. Thank you for reading! #RetractableNeckStrap #Petit #Smartphone #SmartphoneShoulder #Strap #Keys #MobilePhone #KidsPhone #EmployeeID #PassCase #Camping #TrainingCamp #SchoolTrip #OverseasTravel #DomesticTravel #Travel #Souvenir #Japan #japan #Swarovski #Stickers