Configure Alarm System: After locking, the function starts in 8s, and the red light of the alarm lock flashes, When there is a slight shake, Alarm lock will continue to emit 25s 130 db alarm Sound Three-direction locking: The thief must cut off the left right and below sides of the steering wheel at the same time, then he could remove the lock, According to the test, it takes 45 minutes to cut three bars, and most thieves usually give up in 5 minutes without opening the lock Solid steel bar: Heat-treated steel bar, improve the hardness of steel, wear-resisting, strong and durable, prevent cutting saw, prevent beat, rust prevention, crack prevention Unique multi-segment design: The lock adopts the sawtooth design, Scalable and flexible, suitable for more than 99% of the steering wheel, Push it hard can be locked, no need key to operation T-lock:The lock on the steering wheel Three Forks, lock handle clamp the car body, the steering wheel can not rotate, Security anti-theft, Greatly improve anti-theft performance.The length of the steering wheel alarm lock is: 39-45cm (after extension) / 15.5inch-17.7inch.If the steering wheel size is too small, looseness is normal. If the lock is too tight on the steering wheel that will damage the steering wheel. So please check the size before purchasing. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.