CLEAR CALLS: Your voice will come through clearly when you're on a call. A dedicated mic picks up the sound of your voice while a noise-reduction algorithm quietens some of the background noise from the world around you POCKET SIZED CHARGING CASE:The slimline charging case slips easily into a pocket, so you can keep your earbuds protected and charging while you're not using them. Mono mode means you can use either earbud while the other one charges IPX4 SPLASH/SWEAT RESISTANT: Never mind the weather, an IPX4 rating means these earbuds are splash resistant so they don't mind a little rain! Wearing them during a quick workout or on a particularly hot day? They won't mind a little sweat either 28 HOURS PLAYTIME WITH CASE: 7 hours play time from a full charge, an extra 21 hours from the case. Charge earbuds in the case recharge fully in 2 hours. Need a quick boost? Just 15 minutes gives you an extra hour. The case can be charged via USB-C PHILIPS SOUND SIGNATURE: Powerful 13mm neodymium drivers deliver warm, natural sound with decent noise isolation from the on-ear fit. Dynamic Bass can be activated via the Philips Headphones app for powerful sound even at lower volumes