The Smart Charging Case™ transforms into a dongle to wirelessly transmit audio to the earbuds from any AUX or USB-C source

Power input: 100-240V

And the adaptive bass boost algorithm adjusts the bass depending on how loud you’re listening

Rated Power @ 4Ω (20Hz – 20kHz

JBL Charge Essential 2 (Safra) noise cancelling headphones The Smart Charging Case™ transformsPlay and Charge Endlessly. Take the party with you no matter what the weather. The JBL Charge Essential 2 speaker delivers bold JBL Original Pro Sound. Up to 20 hours of playtime and a handy powerbank to keep your devices charged to keep the party going all night. Rain? Spilled drinks? The IPX7 waterproof Charge Essential 2 survives whatever comes its way. General Features Whats in the box Key Specifications General Features Bold JBL Original Pro