Durable material ABS material, strong pressure resistance, durable and tough, after grinding, sandblasting, cutting, anodizing and other surface treatment processes, 360 degree high precision grinding Type-c charging port. Comes with a rechargeable battery. Comes with a charging cable that can hold 2 batteries (only one battery is included, you can purchase it separately if you need it to increase battery life). Charges for 1 hour and lasts for 8 hours, with a maximum Foldable handle for easy storage without taking up space. Comes with a lanyard. Can be hung on the wall or on the arm to prevent falling when not needed. Built-in high-power speaker with loud treble and clear sound quality. Maximum penetration distance of 500 meters. One-button music alarm function, strong deterrence, long sound penetration, buttons with language prompts, real-time feedback to let you confirm whether the button function is triggered correctly. Megaphone Speaker Bullhorn Battery Powered 20W Portable Speaker Microphone System Battery Included Durable ABS Material Volume Control