The JBL Xtreme 3 portable Bluetooth speaker effortlessly delivers massive JBL Original Pro Sound with four drivers and two pumping JBL bass radiators. With PartyBoost, you can connect multiple JBL PartyBoost-enabled speakers. This speaker is waterproof and dustproof with a convenient carrying strap with built-in bottle opener. 1 1/2"L x 4 1/2 "W x 5 1/4"H