Philips BASS+ True Wireless In-Ear Headphones Black SHB4385 item 092122 Big pumping bass: bass+ headphones feature 8. 2 mm speaker drivers that produce big, pumping bass Up to 12 hours of playtime: get up to 6 hours of playtime from the earbuds and recharge in the compact rechargeable Charging Case for another 6 hours (case holds approx. 6 hours of playtime battery) Hands-free calling: enjoy convenient hands-free calling with mic and Bluetooth 4. 1, along with a closed-back acoustic design that keeps ambient noise out and great sound in via enhanced passive noise isolation Secure fit: Designed for optimal fit, bass+ True wireless headphones feature stability Fin for secure fit 3 ear tip sizes for a custom fit: silicon ear caps come in 3 sizes for a better, customized fit Usb charging cable included: the included USB charging cable makes it easy to keep your headphones powered up when you need them. Included Components: Ear TipsUsb CableCharging Case