Jbl pro sound with an optimized long excursion driver, separate tweeter and dual jbl bass radiators. Long lasting battery delivers up to 20 hours of playtime. Take the charge with you anywhere due to its ip67 waterproof and dustproof rating. Partyboost feature allows you to pair two jbl partyboost compatible speakers together in stereo or link multiple jbl partyboost compatible speakers for really incredible sound. Built in powerbank lets you charge your devices without taking a break. Bluetooth frequency 2400 MHz - 2483.5 MHz.