Movement alarms

Awapow Bicycle Light Anti Theft Alarm Wireless Waterproof Auto Brake Sensing Remote Control USB Bike Taillight Horn Lamp Alarm

 £39 (2025) 120 DECIBELS https://www.aliexpress.com/item/1005006988094094.html

Bicycle Alarm, Wireless Anti-Theft Security Alarm for Bike Motorcycle Car Mobility Scooter Vehicles

 £13 (2025) 113 DECIBELS https://www.amazon.co.uk/dp/B07TZTG5JY
Knog Scout Company based in Australia. £50 (2025) 85 Decibels https://www.knog.com/products/scout