Push Down and Lock- Using the foldable anti-theft disc lock, it installs easily and quickly, it does not take up too much space and is not very heavy. What's more, you can leave with peace of mind knowing that your bike is well protected. The disc lock was produced under RoHS Directive (EU) 2015/863, meets EU environmental protection standards, RoHS certificate number: SZXEC2102586001. Vibration Detection Alarm- The Disc locks have many advantages, the most important being that it has a vibration detection alarm. With a built-in chip, it will sound a loud alarm (110dB) which other locks can't. Durable for long term use- With metal and stainless steel cover indoors, its effectiveness remains intact in all weather conditions. The disc lock has 6 batteries, and 6 spare ones. A low battery alarm will be triggered in the event of a power failure. Spring reminder cable included- A bright orange spring reminder cable is included in the package to prevent potential damage that may occur. could be caused when you park your bike somewhere and forget to lock the disc. 7mm/ 0.27 inch locking pin- The disc lock is suitable for brakes with a width of 7mm / 0.27 inch. It not only works on a bicycle, but also on motorcycles, scooters, mopeds, etc. Press and Click Lock Press once to lock and you will hear a beep when locked. Then the alarm mode starts. Vibration Alarm Sensor When the lock or your bike detects vibration 15 seconds after locking, it will sound a 3-tone alarm. It will sound an alarm each time it detects a vibration thereafter, and each time the alarm will last for 10 seconds. Unlock to Stop Alarm Unlock it with the key will prevent it from ringing. Low Battery It will sound a continuous "ge ge ge" or the vibration alarm lasts less than 10 seconds, this is because the battery is low. You will need to unscrew the 4 screws on the locking surface and change the new batteries. (Please pay attention to the positive and negative poles when replacing the batteries) Specifications: Material: Metal cover and stainless steel interior Removal pin locking: approx. 7mm Weight: approx. 400g Package includes: 1 x Disc Lock 1x Spare Battery (LR44) 2 x Keys 1 x Booster cable 1 x Carry bag