Appliance:Teaching,Speech, guide, exercise, promotion, music, personal karaoke etc Character: • Patented design, streamline appearance, ergonomic • Set Microphone speaker, Karaoke,recharger in the multi-function amplifier • Imported advanced high-power amplifier technology and advanced circuit design • Output power can reach 10W, clear sound, fully meet the 30-600 square meters space and outdoor use • Large capacity nimh high cycle rechargeable batteries,circulation  and circular rechargeable battery reaches or even more  than 500 times