With customized 16 core high quality speaker & digital amplifier, strong base and perfect sound effect. Glare flashlight with USA CREE LED, long lifetime, 350 lumen, 250 meter lighting distance that provides equal and stable brightness with excellent life. The battery is replaceable, removable & rechargeable. Not a zombie speaker! The ingenious design makes its longer life and safer usage. LED digital display panel and backlight button, easy operation in the dark. Intelligent circuit system with five protection design: wrong polarity, over charging, over discharging, over load short circuit, and over temperature.