- Maximum sound pressure level: 90 dBA. - Frequency range: 90 Hz - 20 kHz - Speakers: two 2-inch coils and two passive 2-inch by 4-inch coils. - Pairing of up to 8 Bluetooth-capable source devices - connect up to two source devices simultaneously - Wireless range: up to 45 m - Power supply: rechargeable Li-ion battery - Micro USB charging port - Playback time up to 15 hours - Light-reflecting material - Floats - Use the app to download features like party mode, PartyUp remote control on/off, EQ, music alarm, fingertip control and more.