I used it once and then stored it in the box. Product Name: NiziU LIGHT STRAP Product Number: nz23-500-0001 JAN Code: 4571519998387 Size: Circumference - 75mm, Width - 55mm Materials: ABS, TPU, PVC, VELVET Contents: Bracelet band, band outer skin, instruction manual Manufacturing Date: 2023.07 Size: H55 x W288mm Country of Manufacture: China [Recommended Usage] * Requires 2 AAA batteries for use. * Please use alkaline batteries. * Batteries are not included.