For those of 10 watts RMS battery handy megaphone is an easy-to-operate, Hand grip type 10W megaphone, it can be used as a shoulder-type megaphone when the microphone is detached. Features High-Powered Digital Solution Compact & Portable PA Speaker Ergonomic Grip Design Wired Handheld Microphone for Voice Projection Siren Alarm mode 200 Seconds Recording Adjustable Volume Control Extra Audio Input Supported