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JBL PartyBox On-The-Go Bluetooth Speaker with Wireless Microphone Take the JBL PartyBox On-The-Go speaker to any indoor or outdoor event; you're sure to be the life of the party. When you get the invite, sling the useful strap on this portable speaker over your shoulder and head out to the festivities. Once you get to the party, whether it's at the beach or by the pool, you'll be able to feel secure in the knowledge that your JBL PartyBox On-The-Go is IPX4 splashproof.