1.This professional Have a strong and effective amplification device, boasts 30 of sound, with coverage of up to 1600 feet, which can effectively everyone's attention (USB flash disk NOT INCLUDED) 2.240S RECORDING:Up to 240 seconds recording time, high-definition sound. The recording time of 240 seconds makes it easy to record a whole song, as much as possible to your recording needs. 3.USB READER:With Built-in USB Flash slot. It is great for playing music, prerecorded speeches, and play anything you to tell the crowd. Support for MP3 . 4.SIREN ALARM MODE:With just a of a button, the speaker can amplify an emergency tone with adjustable volume control. It blares loudly to quickly attention during emergencies, or while in the middle of a noisy crowd. 5.CONVENIENT AND PORTABLE:It comes with detachable handheld mic, which can be unplugged or plugged in according to your needs. This with an exact dimension of 10.50 inch x 6.40 inch has a convenient quick foldable handle comes in . Colour: Black material: plastic Package Contents: 1 x Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.