Active Noise Cancelling Tune in to your music. Tune out the noise. JBL Pure Bass Sound For 75 years, JBL has engineered the precise, impressive sound found in big venues around the world. These headphones reproduce that same JBL sound, punching out bass that’s both deep and powerful. 35H battery life with BT+NC - 2H recharging time Listen wirelessly for 35 hours with active noise cancelling for long-lasting fun, or 50 hours with ANC off. Recharge the battery quickly in 2 hours.