1. Upgraded Version - Metal head 360-degree rotation, 1.5m white core reflective shoulder strap with light + wrist strap 2-in-1 dual-function model. Our stroller strap is equipped with a lock so they can't detach it. The parent wrist strap can be attached to a stroller, foldable stroller, buggy, or high chair. Parent wrist strap: 23cm (max). Child wrist strap: 6.5cm (max). 2. Strong and Long Spiral Rope - Our toddler reins extend 1.5m (4.9ft) to let your child explore freely. Retract easily. The connecting spiral is a metal cable wrapped in rubber so it won't break. 3. Comfortable to Wear - The wrist strap feels nice and soft against the skin, and the shoulder pad doesn't rub against your child's sensitive skin when wearing sleeves. The adjustable safety belt ensures it won't be tight on the chest or waist when wearing a bulky coat. 4. Application - It can be a child safety backpack or an anti-lost wristband. You can completely remove the reins from the harness and attach the reins to the extra wristband, then you get a wrist connection. It's quick and easy to wear and doesn't take up much space in your bag when not in use. Easy to Activate - Anti-lost wristband: 1) Adjust the length; 2) Clip; 3) Lock the child's side with the key (key included). Child safety backpack: 1) Buckle on the back. 2) Thread the head through the top and then clip them. 3) When not in use, the sides can be folded out to remove the harness.