Features: 1. High volume: this electric bicycle bell with 120 dB volume rings loud enough to notice passers-by and surrounding clyclist and ensure safety when driving and cycling. The bicycle horn is very practical for daily use. 2. 250 mAhs lithiums battery: the rechargeable USB bicycle bell with built-in 250 mAhs lithiums battery and standard USB charging cable. 3. 3 sound modes: In the pre-armed state, short press the and-keys to adjust the sensitivity of the anti-theft device. When entering the pre-armed state, the horn will emit a corresponding prompt sound when entering the anti-theft alarm state: the first gear is a beeps; the other The gear is two beeps; the third gear is three beeps. 4. IPX6 waterproof: this rechargeable bicycle horn can be attached to mountain bikes, road bikes, balance bikes, electric bikes or scooters, which are IPX6 waterproof and can be used on rainy days. 5. Multi-bicycle application: You can use the touching screen bicycle horn on various bicycles such as mountain bikes, road bikes, BMX, children39;s bikes, balance bikes, etc. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: ABSPC Decibel: 80dB-130dB Waterproof rating: lPX6 Battery capacity: 250 mAhs Charging input: 5V-200mA Charging method: USB charging Gross weight: 61g Net weight: 44g Size: As pictue show Package List: 1x Bicycle Electric Horn