Description: Made from high quality ABS plastic, durable and rainproof, long lasting use. 4 Kinds of sounds: whistle, hooter, alarm bell and sound of birds. The bike bell can reach 120 db, delivers enough loud ring tones, catch attention of pedestrian and cars easily. Comes with a charging cable. 250mAh battery, charge for 1.5h can run for up to 5 days used. Easy to install, silicone rubber band with buckles for easy installation. Perfect bicycle accessories for Kids or Adults. Control switch and bike horn are separated. You can install the control switch right next to your thumb, which can keep you hand still on the bar when you press it. Specification: Material: ABS, PC Weight: About 40g Decibel: 100-120db Battery Power: 250mAh Charging Input: 5V-300mA Package Includes: 1 Set Bicycle Electric Horn Note: The sound of this bike horn is too loud, which is not suitable for indoor use.