- Personal amplifier for easy listening - Provides upto 50+dB of ambient sound gain - Rechargeable 1000 mAH Li-ion polymer battery (Included), provides upto 72 hours of continue operation in sound amplifier mode and 24 hours in bluetooth standby mode after fully charged - Convenient belt clip or gaining more enjoyment at day-to-day conversation - Ideal for watch TV, improved listening at worship, lecture or meeting, - Volume control wheel permits easy volume adjustement - Balance control wheel permits adjustment on left and right balance - 2-position frequency switch allows user to enhance desired frequency range -