JBL JBLXTREME4BLUAM Xtreme 4 Portable Waterproof Speaker w/ Shoulder Strap Blue string 8 second measurement using proprietary

8 second measurement using proprietary predictive technology

Large zipper pulls support smooth use

by your sink or your bed

Knives forged from single piece of stainless steel

JBL JBLXTREME4BLUAM Xtreme 4 Portable Waterproof Speaker w/ Shoulder Strap Blue string 8 second measurement using proprietaryJBL Pro Sound 2 woofers 2 drivers and dual pumping JBL Bass Radiators. Up to 24 hours of battery life on a single charge. Playtime Boost add 6 hours to battery life. AI Sound Boost predict loudspeaker movement and power response. IP67 Water and dustproof handles poolside parties or a seaside picnic. Pair speakers with PartyBoost or Auracast. Built in power bank. 10 Minute Fast Charge. JBL Portable app. Convenient shoulder strap. Transducers: 2 x 2.