JBL Go 4 - Ultra Portable Bluetooth SpeakerDon't let its compact size fool you; the JBL Go 4 packs a powerful punch with JBL Pro Sound that delivers surprisingly rich bass. Enjoy up to 7 hours of playtime on a single charge. Need a little extra boost? Simply hit the Playtime Boost button to extend your listening time by up to 2 hours. With its IP67 waterproof and dustproof rating, you can take the Go 4 to the pool party or the beach without worrying about water or dust damage. And with the