Key benefits Reminder rope keeps you aware that the bike lock is in place and must be removed before riding, reducing the risk of attempting to ride with the lock engaged. 4digit password provides convenient setup and practical security without relying on everyday keys. Aluminum alloy body offers lightweight handling with durable, pryresistant construction for reliable protection. Compatible with disc brake discs with a diameter greater than 7 mm, making it suitable for a wide range of bicycles and motorcycles. Specifications and features Function: reminder rope design plus a secure 4digit combination lock for simple, keyless security. Compatibility: suitable for disc brake discs with diameter greater than 7 mm; compatible with road bikes, mountain bikes, electric bikes, and motorcycles. Size and weight: constructed to be lightweight for easy carrying and handling. Material: aluminum alloy for strength and durability. Performance: designed to resist prying and provide dependable protection during parked use. Use scenarios City commuting or routine errands: park your bike, apply the lock, and use the reminder rope to prompt removal before riding, while the 4digit code keeps your bike secure at the rack. Road trips or trailhead stops: secure the bike or motorcycle at rest points with the lock in place, then set a known 4digit code for access when you . Shared or multivehicle use: convenient, keyless security for bikes or motorcycles kept in shared spaces, with a code you control and update as needed.