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 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 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: 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 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.