K21 300mAh Sport Uniaural bluetooth Earphone Headset With Mic Business Sweatproof Waterproof

Features:1. Long lasting working life, with 300mAh battery, support approximately 24 hours playback.2. Uniaural earphone, 180 rotatable earbud, fits for both right ear and left ear.3. Unique metal sound cavity, low interference, produces more rich immersive sound.4. Sweatproof and waterproof, protect your device from splash, sweat, rain and etc.5. CVC 6.0 noise cancelling, reduces the environmental noise effectively, more clear calls.Specifications:General SpecificationModel K21Color White, BlackWearing Type In-ear, Earhook designNet Weight (g) About 14gTechnical Parameters Microphone Yes bluetooth Version V4.1 Transmission Distance 10mFrequency Response 20-20000Hz Battery Capacity 300mAh, 3.7V Charging Time (h) 2.5 hours Talking Time 32 hours MuisicTime (h) 24 hours Standby Time (h) 250 hoursPackageIncluded:1* K21 bluetooth Earphone1* Charing Cable2* Pairs of earmuffs1* Manual