JBL JBLPARTYBOXGOBAM-Z On-The-Go Portable Speaker - Certified Refurbished. From beach parties to festivals, the JBL PartyBox On-The-Go lets you see, hear and feel the beat. Turn it up loud with 100 watts of powerful JBL Pro Sound, synched to a dazzling light show. Access your favorite tunes with Bluetooth, USB, AUX and TWS (True Wireless Stereo) connectivity, grab a friend and sing your hearts out with the JBL wireless mics, or use the instrument input to play along. With a bottle opener, padded shoulder strap, rechargeable battery and IPX4 splash-proof protection, the JBL Party Box On-The-Go has everything you need to get the party started—and take it with you..