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
TOSUOD Bicycle Combination Lock 6 Digit Password Lock Anti-theft Safety Bike Cable Lock Elasticity Coiled Lock Bike Accessories
Aliexpress UK
WEST BIKING Foldable Bike Lock With 3 Keys Hamburg-Lock Alloy Anti-Theft Strong Security Bicycle Folding Lock Mount Bracket Bike Chain Lock. Material: zinc alloy + alloy steel +ABS plastic +PA6 plastic +59 copper.
eBay
RIDERACE Bicycle Chain Lock Portable Anti-theft High Security MTB Mountain Bike Lock With 2 Keys For Scooter Electric E-Bike
Aliexpress UK
Steel Security Cable & Padlock. Padlock: 30mm x 20mm.
eBay
RIDERACE Bicycle Chain Lock Portable Anti-theft High Security MTB Mountain Bike Lock With 2 Keys For Scooter Electric E-Bike
Aliexpress UK
1x Bicycle Chain Lock. Easy to lock: You can just snap it together to get it locked without the keys. No bike lock is 100% secure. The lock body is made of durable steel and covered with black Oxford cloth.
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Falante Bicycle U Lock support Be used for MTB Road Mountain Bike Lock Bicycle Accessories pp plastic
Aliexpress UK
High Quality Security Spiral Lock. Color-Black, Red, Blue (choose From the Drop Down). size : 65cm. Anti-Impact Design.
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Bike Lock 1.2m 1.8m Anti Theft Bicycle Accessories Portable Bicycle Wirerope Lock For MTB Road Motorcycle Convenient and Swift
Aliexpress UK
Functionally they are identical and both are 'The world's strongest folding bike lock' (Sold Secure Gold & ART 3 rated). Model: Foldylock 90 (Forever). Foldylock 90 is a premium folding lock and is the highest security level folding lock ever made (Sold Secure GOLD).
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Bicycle Mini Password/Key Lock Portable Helmet Lock Durable Steel Wire Lock Mountain Bike Frame Lock Bicycle Accessories
Aliexpress UK
Biaggi uk ltd.
eBay
RIDERACE Bicycle Chain Lock Portable Anti-theft High Security MTB Mountain Bike Lock With 2 Keys For Scooter Electric E-Bike
Aliexpress UK
The TRELOCK Bike Lock is a portable U-lock designed for motorcycles and tricycles, made from durable steel material in a sleek black colour. Known for its key lock mechanism, this lock is easy to use and provides a secure way to protect your vehicle. Its compact and portable design makes it convenient to carry around, ensuring that you can always keep your bike safe wherever you go. Designed in China, this U-lock offers peace of mind for cyclists looking to safeguard their two-wheeled companions.
eBay
WEST BIKING High Security Bicycle Chain Lock Portable Anti-theft MTB Mountain Bike Lock With 2 Keys For Scooter Electric Bike
Aliexpress UK