CLEAR AND LOUD SOUND: Your voice will definitely be heard in every corner with our professional portable voice amplifier The sound is perfectly clear, without background noise, and covers 10000sq. ft / 1000sqm, so you can make your voice be heard by anyone PORTABLE AND LIGHTWEIGHT: Our portable audio system has a portable design, as it is super lightweight, weighing only 8.8oz, with a user-friendly shape. It is equipped with a back clip to fix the device at your belt or pocket, or you can hang it around your waist with the help of the waistband belt included. MULTIPURPOSE USE: This personal voice amplifier features 6 functioning modes. You can use it as a voice amplifier, to record information, as a powerful speaker. Also, it can help you make selfies and play music via Bluetooth, USB, or listen to the radio. LONG BATTERY AUTONOMY: You can enjoy the functionality of our multipurpose voice amplifier for many hours as it is equipped with a powerful 2200mAh rechargeable lithium battery. It can resist up to 8 hours in use and it takes only 3-5 hours to fully charge, using a USB adapter and cable. VERSATILE AND PRACTICAL: Powerful, portable, and super easy to use, this amplifier speaker system is a must-have It can be used for a wide range of purposes, to make your voice heard at meetings, or when teaching in a large room, for big outdoor events, such as weddings, or tourist guides. Material: plasticFrequency range: 80-20000 (Hz)Distortion rate: 0.03 ( %)Output power: 3 (w)Rated voltage range: DC 36V and below