Designed for sweat premium Hi-Fi sound comfortable extended wear, best companion noise canceling CVC6. 0 built-in microphone sweat proof in-ear headphones fast charging times (1-2 hours) playback time: 4 hours for music and 6 hours talk time operation range: 30ft functions: volume control, music control, calling, voice prompt> what's in the box? 1 pc x ailed wireless earphones (Blue) 1 pc x Micro USB charging Cable3 pairs x ear tips (3 Replacement PC x user manual Note: This device is Daily water Resistant and sweat-proof, it is good for running, jogging, cycling, working out, but not suitable for swimming which means it can protect itself against sweat, Wine, rain spray, etc. , but it won't perform well when too much water Comes in. Please feel free to tell us if you have more Suggestions!