The Green Lion PartyLife 400 Bluetooth Speaker is an ideal complement for any party or event. Designed for those who enjoy entertaining, this powerful speaker gives an amazing audio experience and has features that will keep guests dancing all night. The PartyLife 400 has a frequency range of 50Hz to 20kHz (+/-3 dB), so you can hear every beat, melody, and subtlety. Its strong bass capabilities will bring your favorite tracks to life, reverberating around the room and adding a rich, immersive dimension to your music. Despite its high output, the speaker has a sensitivity of 85 dB (+/-2 dB), which leads to balanced sounds that are both loud and clear. The built-in 3600mAh battery enables up to 1.5 hours of uninterrupted playback. When it comes time to recharge, the speaker takes between 5 and 8 hours to fully charge, ensuring it is ready for the next occasion.