Latest Bluetooth 4.0 technology; easy and fast pairing with smartphones、 tablets and other Bluetooth enabled music devices360 degree Adjustable In-ear Earpiece and come with different sizes to make sure there's a comfortable and stable to fit your ears' contours. Really for your sporty or exercising activities.CVC Noise Cancellation 6.0 technology reduces outside noises、 enable clear and plenty sound、 you get high quality hands-free music and phone conversation even on the street or inside shopping mallUp to 6 hours of continuous talking / music time and up to 200 hours of standby with 2 hours full charge、 make your daily life with the Bluetooth device easier.Allow you to pair and maintain connections with two devices at the same timeFeatures: 1. Stream audio from your smartphone via wireless Bluetooth connection 2. Make every call worry-free 3. Inbuilt microphone is sensitive enough to pick up your voice clearly 4. 360-degree rotatable ear hook allows for free adjustment 5. Ergonomic design、 stay comfortably on your ear 6. Allow you to pair and maintain connections with two devices at the same time 7. Sleek design elevates your everyday style Specifications: 1. Transmission Distance: 10m 2. Bluetooth Mode: Hands Free / Headset Profile 3. Power Charger: AC Input 100-240V / DC Output 5V 4. Radio Frequency: 2.4GHz 5. Music Time: about 5Hours 6. Talking Time: about 10 Hours 7. Standby Time: Up to 23 days. 8. Color: Black 9. Dimensions: (24.8 x 0.43)" / (63 x 1.1)cm (L x W) 10. Weight: 0.35oz / 10g Package Includes: 1 x Bluetooth Headset 1 x USB Cable 1 x User Manual 1 x Clamp 4 x Headphones Silicone Earmuffs