Go 4 - Ultra-Portable Bluetooth Speaker - Black Ultra-portable Pro Sound with punchier bass, Up to 7 hours of playtime plus 2 hours with Playtime Boost

Ultra-portable Pro Sound with punchier bass: Don't let its small size deceive you. The Go 4 delivers powerful sound from a compact speaker. Up to 7 hours of playtime plus 2 hours with Playtime Boost. The Go 4 provides up to 7 hours of playtime on a single charge, and Playtime Boost adds up to 2 more hours per charge.
Waterproof and dustproof: The Go 4 has an IP67 waterproof and dustproof rating for use in almost any environment, from poolside parties to seaside picnics.
Multi-speaker connection by Auracast: Pair two Go4s for stereo sound, or wirelessly connect multiple Auracast-enabled speakers for bigger sound. Made in part with recycled materials: The Go 4 incorporates post-consumer recycled plastic and fabric for the speaker grille. It is packaged in FSC-certified paper printed with soy ink