Features: PROJECT YOUR VOICE AND SUPPORT MP3 AUDIO PLAYING - The portable voice amplifier is designed with super 18W output, provides a clear, natural and crystal voice, sounds coverage up to 25000sq.ft and ideal for a group of 200-300 people. Supports TF card, U disk and AUX line-in to play music, easily turn the voice amplifier into a music speaker. 3 HOURS QUICK CHARGE FOR 8-12 HOURS TALKING - Rechargeable voice amplifier built-in a 1200mAh big lithium battery allows the microphone speaker to only take 3-5 hours to fully charge, but plays up to 12 hours of amplify time and up to 8 hours of music playtime. ADJUSTABLE AND COMFORTABLE MICROPHONE HEADSET - Shidu personal voice amplifier is included wired headset microphone which can be positioned near your mouth with its flexible gooseneck design. Super light and comfortable, can stay on your head well, do not hurt your head after a long period of time. LIGHTWEIGHT AND EASY TO USE 18W portable voice amplifier S512 is such a nice voice speaker which can amplify your voice across the room clearly and save your throat. Suitable for teachers, singing, coaches, tour guides, elderly, fitness instructors, parkinsons, presentation, yoga, outdoors, speech, classroom and so on. It also supports TF card, U disk & Aux audio input which could let you enjoy the wonderful music after work. Easy to Use Operation is straight forward - just plug in the headset and turn the speaker on. Small & Lightweight You can wear this mini voice amplifier around waist or hang it on neck with the help of a waistband. One of The Best Things It could work well for elderly who cannot project their voice, keep them socially involved. And good for the one who is having trouble with their own vocal volume. Specifications: Output power: 18W Battery capacity: 1200mAh Charging voltage: DC5V, 500mAh Working time: 8-12 hours (MIC mode); 6-8 hours (Musical mode). (It’s up to the volume you control) Charging time: 3-5 hours Sounds coverage: 25000sq.ft Product size: 98mm*88mm*43mm Unit weight: 0.48 lb What's in the box? 1 x Voice Amplifier 1 x Wired Microphone Headset 1 x Waistband 1 x Audio Cable 1 x USB Cable 1 x DC 5V Charger 1 x User Manual Portable Voice Amplifier Microphone and Speaker System Personal Speaker with Microphone Original SHIDU Voice Amplifier, Portable Microphone Amplifier Speaker Small PA System with Wired Microphone Headset for Teachers, Singing, Fitness Instructor, Classroom, Elderly Portable Ultralight Mini Voice Amplifier With Wired Microphone Headset and Waistband Rechargeable PA System Supports MP3 Format Audio for Teachers, Singing, Coaches, Training, Presentation, Costumes