Features Adopt 15mm bone conduction unit with better bass performance and clearer voice Fully enclosed design reduces sound leakage and protects privacy IPX8 waterproof rating can withstand any rain from bad weather and sweat from high intensity workouts Superior bluetooth V5 4 chip Enhance stable signal transmission and high speed connection ability reduce power consumption to increase battery life 10h playback time Long lasting battery life endurance performance ENC calls noise reduction Reduce environment noise deliver the sound details clearly Note Earphone resistance to water but do not use under water for more than half an hour Specifications BrandBlitzWolf®ModelBW BTS10ColorBlackWearing TypeOpen earNet Weight g 62gSize86mm 66 6mm 21mmDriver DimensionsΦ15 10 4 2mm HMicrophoneYesVolume ControlYesbluetooth VersionV5 4Support Audio decodingAAC SBCSupported ProfilesHFP A2DP AVRCPTransmission Distance33 feet 10m Frequency Response20 20k HzBattery CapacityEarbud 65mAh 2 Charging Box 300mAhCharging Time h 2hMusic Time6 10hWaterproofIPX8PackageIncluded 1 BlitzWolf® BW BTS10 OWS Earbuds with Charging Cable 1 Charging Cable 1 User Manual