Sound+: Maximum Volume Enhance 50%. 2 x 4 watts high-end low-impedance speakers larger than normal 10 watts. Keeping sound distortion-free clarity through dual high-performance drivers.Bass+: Balanced Bass and Portable Size. One big size passive subwoofer in a portable size box(2.1 x 5.6 x 1.7 inches). Balanced Bass and clarity sound fit for every type of music.Playtime+: Incredible up-to 24 hours playtime powered by a built-in high capacity Li-ion battery and independent researched Low power consumption driver. Keeping sound stable on low-power status.Connect+: Latest Bluetooth v4.1 with A2DP, connect fast and stable. NFC quick match, a cool and useful feature absent from the vast majority of wireless speakers.Portable+: Handheld size and IPx5 Waterproof to take ourside party and to prevent splash, slight impact or fall.