Shidu Portable Mini Voice Amplifier For Teachers, Tour Guides, Coaches, Yoga Product Features ??Powerful Sound ?The voice amplifier is in compact size, but with 10W output crystal sound and no noise is loud enough to cover a room with a large group of 25-100 people. The stable performance perfect for amplifying your sound and saving your throat. ??Long Battery life and Multifunctional? - The voice amplifier with a 1800mAh built-in big rechargeable lithium battery provides 8 to 12 hours amplify time and 6 to 10 hours music time with a full charge.And the voice amplifier takes only 3-5 hours fully charged.And you can use it not only as a voice amplifier but a music player from a TF card or USB flash disk. ??Adjustable Microphone Headset? -The microphone headset is lightweight and adjustable.You can adjust the distance between the microphone and mouth with its flexible gooseneck.Comfortable design makes it convenient for your teaching, training, presention and other activies. ??Compact and Easy Carry Around? - The portable microphone and speaker is in compact size and super lightweight, you can use the back detachable clip to fix it on your belt or pocket, or you can also tie it around your waist or hang it on your neck with the help of the waistband. ??Warm Tips and Guarantee? -Please keep the speaker and mic for a distance and facing away each other to avoid the signal affected.Worry -Free Warranty.We provide return and refund without reason in 30 days, and 12- month warranty, and lifetime technical support. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!