Go 4 - Ultra-Portable, Waterproof and Dustproof Bluetooth Speaker, Big Pro Sound with Punchy bass, 7-Hour Built-in Battery, Made in Part with Recycled Materials (Black)

Ultra-portable Pro Sound with enhanced bass: Do not be deceived by its compact size. The Go 4 delivers a powerful musical impact. Your friends will be amazed by the impressive Pro Sound produced by such a small speaker. Up to 7 hours of playback plus 2 hours with
Playtime Boost: Do not worry about minor details like battery charging. The Go 4 provides up to 7 hours of playback on a single charge. Activate Playtime Boost to gain up to 2 additional hours of use.
Waterproof and dustproof: With an IP67 waterproof and dustproof rating, this portable speaker is built to withstand nearly any setting, from a poolside gathering to a seaside outing.
Multi-speaker connection via Auracast: Desire even more expansive Pro Sound? Connect two Go 4 units for stereo audio, or wirelessly link multiple Auracast-compatible speakers using Auracast for an even larger sound experience.
Constructed partially from recycled materials: The Go 4 utilizes post-consumer recycled plastic and fabric for its speaker grille. Its packaging is also made from FSC-certified paper printed with soy ink