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 punchier bass: Don't let its compact size fool you. The Go 4 delivers powerful audio from a compact speaker. Up to 7 hours of playtime plus 2 hours with Playtime Boost. The Go 4 offers up to 7 hours of playtime on a single charge. Tap Playtime Boost to add up to 2 more hours of playtime.
Waterproof and dustproof: The Go 4's IP67 waterproof and dustproof rating helps this portable speaker withstand almost any environment, from a poolside party to a seaside picnic.
Multi-speaker connection by Auracast: Pair two Go4s for stereo sound, or wirelessly connect multiple Auracast-enabled speakers using Auracast for bigger audio. Made in part with recycled materials: The Go 4 uses post-consumer recycled plastic and fabric for the speaker grille. It is packaged in FSC-certified paper printed with soy ink