Feature: Brand new and high quality. This Voice Amplifiers is a multifunctional portable loudspeaker with sound-amplifying, music playing function. Imported high-power amplifier chip and advanced off-fidelity amplifier master control. Using high-power speakers, this sound effect is clear and loud, covering a wide range of transmission. High capacity, high safety, chargeable lithium battery. You can tie the voice amplifier around your waist or hang it on your neck with the help of the waistband, very easy to carry. Specification: Output power: 15W Battery: 2200mA Size: 110 mm * 90 mm * 30 mm Frequency response: 100Hz-10kHz Use time: 8-10 Hours Charging Time: 3-5hours Package weight: 500g Package Include: 1 x VoiceAmplifier 1 x Wired Microphone Headset 1 x Waistband 1 x Charging Plug 1 x Audio Cable 1 x User Manual Note: 1. In order to achieve the best sound amplification, place the microphone head 1cm in front of the mouth and speak at the microphone head; 2. If there is a howling, please turn down the volume and pull the machine and the microphone away to prevent interference; 3. It is recommended to charge the battery after using up.