The HM-130U handheld lithium megaphone hand mic is very small in weight and light, it can be easily carried in one hand. These mics are widely used for various important announcements. An improved polyimide diaphragm is used to ensure high-quality sound. The microphone used in it is of very good quality, resulting in a clear and loud sound. Hand grip type loudspeaker, polyamide diaphragm for high-quality sound, with 18650 model 1800mAh battery. It can give 10 hours of battery backup when talking, 5-hour battery when using the MP3 option, and 2 hours when the siren is sounded. It has the opportunity to use a memory card as well as a USB.