I bought this for my child, but they're not using it, so I'm selling it. It runs on batteries, but I don't know the remaining battery life or how to change them. I hope someone can make good use of it. Thank you very much! ^ - ^ Colorful children's wristwatch with a unicorn design. - Design: Unicorn motif wristwatch - Color: Pink - Material: Silicone band - Features: Three-dimensional unicorn decoration - Dial: Display of colorful numbers - Buckle: Metal buckle Thank you for looking.