Smart 4-digit reset table combination chain lock. The default password is 0000 . ???????????? ?????? ?????????????? - Quality Zinc Alloy and ABS-made lock, sturdy and durable with a high grade of anti-theft, anti-breaking, and anti-cutting functions. The hamburger lock materials are zinc alloy and ABS special material, which have the functions of Anti-theft, anti-cut, and tamper-proof. ??????????-?????????? ?????? ???????????????????? ???????????? - The lock core surface is fully sprayed with rubber lacquer, and the anti-impact bumper during transportation reduces noise, effectively preventing damage to the bicycle frame, and can be directly locked on the lock frame, protecting the folding lock and preventing the lock from being unlocked. ???????? ?????????? ?????????????????? ?????????? ?????? - high-class stainless steel keys, distinguished key mouth design to avoid mixed opening. ???????? ???????????????? - Bicycles are mostly quick-release seats, there are security risks; they can easily be taken away. A wheel and seat distance of 20 cm can lock the wheel and seat. After folding, the bike lock is 19*8*7.5 cm , compact, lightweight, and convenient to store in a top tube bag, saddlebag, etc. The length of the lock is 85 cm , which is sufficient to connect 2-3 ebikes together. ???????? ???? ??????????, ??????????????, ?????? ???????????????? - The Folding lock fits most bikes, it only weighs 800g and is easy to carry, featuring special rivets that make folding easy.