Features: Lock automatically with no need of key. Four digit password, ten thousand possibilities, safe enough. High quality zinc alloy lock,solid, durable and weather-resistant. 11.95mm self-coiling steel cable, high strength and flexibility, prevent it from strong cutting. PVC coating protects the cable from scratching your bike. Lighting design make it more convenient in dark. Stretched length is up to 1.2m / 3.9ft, long enough to lock your helmet or bike. With a free bike mounting bracket for easy transportation. Suitable for bicycles, scooters, motorcycles, etc, locking your helmet, saddle, wheels and luggage.