[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: 12W Charging voltage: DC 5V 1A Use music time: 6-8 Hours Frequency response: 50Hz-15000Hz Working temperature:-10��~45�� Use of amplification:6-8 Hours Charging time: 4 Hours Package Include: 1 x Black Voice Amplifier 1 x Wired Microphone Headset 1 x Waistband 1 x USB Cable 1 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