Approx.100-110DB Loud alarm siren. When the lock body or vehicle is vibrated, the lock will give an alarm "DU DU DU". When the lock is vibrated again, it will give an alarm and keep the alarm with serial vibration.
eBay
WEST BIKING Bicycle Folding Lock Portable Alloy Steel Anti-theft Safety Lock Motorcycle E-bike Lock MTB Road Bike Accessories
Aliexpress UK
Resettable Cable Chain Bike Lock Portable Padlock 4 Digit Combination Number. Weatherproof Security Padlock Outdoor Heavy Duty 4 Digit Combination Pad Lock[1]. Tarpaulin Heavy Duty Waterproof Eyelets Cover Tarp Garage Ground Sheet 180GSM.
eBay
WEST BIKING Bike Folding Lock Portable Alloy Steel Anti-theft Safety Lock Motorcycle E-bike Lock MTB Road Bike Accessories
Aliexpress UK
Mainland China.
eBay
60/65/85/105cm Metal Anti-Theft MTB Road Bike Heavy Duty Safety Lock for Motorcycle Scooter Padlock Bicycle Chain Lock with Key
Aliexpress UK
Material:steel carbon+zinc alloy lock cylinder. Zinc Alloy C-class Anti-Theft Lock cylinder. Double Lock Tamper-proof. 1.High-strength steelzinc alloy lock core.
eBay
TOSUOD Foldable Bike Lock Key Strong Security Anti-theft Bicycle Password Lock Heavy Chain Cable Padlock Motorcycle Lock
Aliexpress UK
7 mm thick hardened steel chain:Can protect bicycle security. Lock is more durable:Improved version with optimisation of the lock head material and various nylon material.
eBay
65/85/105/125cm Metal Anti-Theft MTB Road Bike Heavy Duty Safety Lock for Motorcycle Scooter Padlock Bicycle Chain Lock with Key
Aliexpress UK
【Anti-saw and anti-cut 】The chain lock body is made of durable steel and covered with black Oxford cloth. It is 3.8mm thick and weighs 0.7 kg, which can effectively resist attacks from saw blades and other tools.
eBay
Bike Steel Cable Lock with Mounting Bracket Bicycle Steel Wire Lock High Security Mountain Bike Safety Lock for MTB Road Bike
Aliexpress UK
Yale YCL3/10/110/1 Chain & Lock 1100mm Maximum Security Chain Bike Lock 1100mm Heavy Duty Protection 4 Keys Including 1 with Micro-Light, Black The Yale 1100mm Chain & Lock is a robust and reliable security solution designed to provide maximum protection for your valuable possessions, especially bicycles. Crafted with heavy-duty materials and advanced locking mechanisms, this product ensures peace of mind against theft and unauthorized access.
eBay
Falante Anti-theft Bike U Lock 2 Brass keys With Heavy Duty U Lock Motorcycle Front fork lock Bicycle Lock waterproof 3 Size
Aliexpress UK
Features:Foldable,Mini Portable, Sturdy and Durable,Safe and Anti-theft, available in rainy. Suitable:Bicycle, Motorcycle, Electric Bike and so on. Bike Portable Folding Lock. Material:ABS+ Alloy Steel.
eBay
Universal Anti-Theft Bike Bicycle Lock Stainless Steel Cable Coil For Castle Motorcycle Cycle Mtb Bike Security Lock With 2 Key
Aliexpress UK