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. Supports Bluetooth USB Flash Drive TF card. The voice amplifier is not only a nice voice saver which with super 10 Watts output, provides a clear, natural and crystal voice, sounds coverage up to 10000 square feet and ideal for a small or large group of 40-100 people. Not only an amplifiers but also a portable Bluetooth speaker, you can stream your favorite music from any type of Bluetooth-enabled mobile device, up to 33 feet away. This Bluetooth amplifier is small in size and 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, very easy to carry. Also a MP3 player which supports TF card & U disk. Specifications: Max output power 10W Output Impedance 4Ω Charging voltage DC 5V 1A Music-play time 6-10 hours Frequency response 90Hz-18KHz Work temperature -10℃-45℃ Amplify time 8-12 hours Charging time 3-5 hours