Rechargeable bell for electric bikes, super loud whistle, anti-theft alarm

General Description: The rechargeable bell for electric bikes is an essential accessory for cyclists. With a super-powerful whistle and an anti-theft alarm, it's perfectly suited to your outdoor cycling needs. Its design is waterproof (IPX5), dustproof, and explosion-proof, ensuring long-lasting use in various conditions. Technical Specifications: Battery: 200 mAh lithium-ion; Charging time: 1.2 hours via USB cable; Battery life: 20 to 30 days of continuous operation; Maximum volume: 125 dB; Size: 38 x 60 mm; Color: Black. Compatibility and Accessories: Compatible with handlebars with a diameter of 22.2 - 31.8 mm; Suitable for cube bikes, mountain bikes, children's bikes, and city bikes. Installation: Easy to install and remove; simply attach the bell to the handlebar and secure it with the silicone buttons—no tools required. Operation: To activate the anti-theft function, press and hold the switch on the back. If the bike is moved, the audible alarm will sound for 15 seconds. If it is triggered again, the alarm will sound continuously until the switch is turned off.