Electric Horn can be used on scooter, road bike, mountain bike, kids bike. Designed with a small size and a modern appearance, integrated in a reinforcement circuit with a strong sound that reaches 100 db with 280 mAh rechargeable lithium battery, charging is done through USB cable with a time of 1.2 hours for get a full charge. Battery life: Approximately 20-30 daysPay attention to the charging of the speaker, the red indicator light will turn on when charging, when it is fully charged the light will turn green. The electric bike horn with IP 65 water resistance level, three protections: waterproof, drop and dust resistant, meet your daily use. Material: ABS + PC Battery: Built-in 280mAh lithium battery Size: 6.5 x 5cm Weight: About 46g Package List: 1 x Bike Bell 1 x Handle Remote 1 x Rubber Band 1 x Charging Cable 1 x User Manual