Philips BASS+ SHB4385 Wireless in-Ear Earbuds, with up to 6+6 Hours of Playtime, Charging case - BlackBrand: Philips Audio Color: Black Features: 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