Description: OLAKIDS bike for kids 10-12 is specially designed for children, combining outstanding appearance with practicality and safety. It features 5+2 lighting modes that sync to music played via Bluetooth from a phone, making children more visible and secure when riding at night. Equipped with a 6-speed trigger shifter, this girls bicycle allows smooth gear changes whether on flat neighborhood paths or gentle slopes, ensuring effortless and flexible riding. The stem supports 4 modification styles: quill stem, threadless stem, BMX stem and basic stem. Tools and related components need to be provided by the users. The materials and details provide all-round protection for child's safety. What's more, the kids bike comes 85% pre-assembled, so it can be set up quickly without complicated steps, letting child start their fun riding journey in no time. Specifications Color: Black/Pink Net Weight: 31.1 lbs/14.1 kg Weight Capacity: 148 lbs/67 kg Material: Carbon Steel+PP Overall Dimension: 56.30" x 22.83" x 39.57‘'/143 cm x 58 cm x 100.5cm(L x W x H) Adjustable Seat Height : 29.53''-38.19''/75-97 cm Adjustable Handlebar Height: 35.83''-39.96''/91-101.5 cm Suitable Age: 8+ Years Old Package Includes: 1 x Kids Mountain Bike 1 x Wrench 1 x Instruction