Usage Tips:[DETAIL]Feature:This Voice Amplifier is a multifunctional portable loudspeaker with sound-amplifying, digital 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, class A 18650 lithium battery.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. If it is not used for a long time, it should be charged once a week.Specification:Output power: 12WCharging voltage: DC 5V 1AUse music time: 6-8 HoursFrequency response: 50Hz-15000HzWorking temperature:-10��~45��Use of amplification:6-8 HoursCharging time: 4 HoursPackage Include:1 x Black Voice Amplifier1 x Wired Microphone Headset1 x Waistband1 x USB Cable1 x User Manual[ATTRIBUTES]- Battery Included: Yes- Hign-concerned Chemical: None- Power Output: 15- Battery Included: Yes- Hign-concerned Chemical: None- Power Output: 15- Support MP3: Yes- Voice Record: No- Dimensions (WxHxD)): 12X8X9- Weight: 0.45- Material: Plastic- Model Number: T15- Battery Life (Hour): 5 Hours- Item Type: Wearable Megaphone- Brand Name: ZUIDID- Origin: Mainland China- Battery Life: 3.5 Hours- Certification: None