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 stronger bass: Don't let its small size fool you. The Go 4 delivers powerful sound from a compact speaker. Up to 7 hours of playtime plus 2 hours with Playtime Boost. Tap Playtime Boost to add up to 2 more hours of playtime.
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 Go 4 speakers for stereo sound, or wirelessly connect multiple Auracast-enabled speakers for larger 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