- Toprek TQ-04 bicycle bell designed to conceal and protect an Apple AirTag, making it easy to track and secure your bike - Powerful 110dB sound, audible in noisy environments and heavy traffic - Made of high-quality aluminum alloy, resistant to corrosion, water, and sunlight - Special metal security screws that can only be opened with the proper tool, protecting the AirTag against theft - Seamless design that protects the AirTag from impacts, sun, and rain - Quick and easy installation with included Allen key and anti-slip washer - Compatible with handlebars from 22.2 to 31.8 mm, includes adapters for different diameters - Suitable for mountain, electric, urban, road, fitness, kids' bikes, tricycles, and scooters - Excellent option for those seeking security, durability, and universal compatibility in a bicycle bell