JBL Pure Bass sound For over 70 years, JBL has engineered the precise, impressive sound found in big venues around the world. These headphones reproduce that same JBL DNA, punching out bass that’s both deep and powerful. 6hour battery life Enjoy your music and take calls for 6 hours. Get a full recharge in 2 hours. Handsfree calls Easily control your sound and manage calls from your headphones with the convenient threebutton remote with microphone. Tanglefree fl at cable A fl at cable that’s durable and won’t tangle up in knots. Comfortfi t earbuds The soft, ergonomically shaped earbuds allow you to enjoy your music in full comfort.