Product selling points: Easy to carry: Enhance your speech with our portable amplifier, which amplifies your voice at high volumes while protecting your vocal cords. It is easy to carry and, due to its lightweight design and small size, can provide clear voice output. Efficient design: Enhance your voice with our portable amplifier, which is equipped with a long-lasting 1200mAh battery and can be used continuously for up to 12 hours. Clear sound projection: Experience stable performance and flexible gooseneck design to ensure clear sound, as it can be placed directly on the mouth and supports music playback. Multi functional use: Suitable for various purposes, from shopping mall speeches to outdoor speeches to yoga classes, this portable amplifier can improve your voice and attract your audience. Communicate confidently and clearly. Charging input: 5V-2A Battery: 3.7V, 1200mAh Frequency response: 150Hz-20kHz Signal to noise ratio: greater than 75dB Effective distance: 15 meters Supported formats: MP3 TF card: Supports up to 32GB (not included) Color: Black Material: plastic Package Contents: 1 x Bluetooth speaker 1 x wired microphone 1 x belt strap 1 x charging cable 1 x English instruction manual