![Wireless Bluetooth Streaming](/on/demandware.static/-/Sites-masterCatalog_Harman/default/dwc78b537a/pdp/wireless-bt-f01.png)
Wireless Bluetooth Streaming
Wirelessly connect up to 2 smartphones or tablets to the speaker and take turns enjoying powerful sound.
![Up to 20 hours of playtime](/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw46aaf1bd/pdp/20-hrs-playtime-f02.png)
Up to 20 hours of playtime
Built-in rechargeable Li-ion 7500mAH battery supports up to 20 hours of playtime and charges your device via USB port.
![IPX7 waterproof](/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw15675e05/pdp/water-proof-f03.png)
IPX7 waterproof
Take Charge 4 to the beach or the pool without worrying about spills or even submersion in water.
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