*Standby time: 11 days *Call time: 8 hours *Music playback time: 6-8 hours *Charging time: <2 hours *Sensitivity: 123dB *Resistance: 16Ω *Frequency response range: 20-20000HZ *Size: 200x50x20mm/7.9x2.0x0.8in *Weight: 49g Product Details: Features: 1. Adopt the latest CSR8615 Bluetooth 4.1 dual mode dual MIC chip. 2 support up and down song selection, and volume control. 3. Support music playback pause control, and automatic call switching function. 4. Support S3D stereo enhancement (high quality, high fidelity, super stereo digital audio enjoyment). 5. Support one for two, dual headphone output. 6. Support a variety of smartphones and tablets. 7. Support 20M link transmission distance. 8. Ultra-low voltage version, long standby time, continuous listening for 8 hours, standby time 120 hours. 9. Noise Reduction Technology: Triple microphone technology eliminates background and wind noise in the crowd. 10. Anti-sweat technology: Protect this Bluetooth headset from sweat and coffee spills, so you can wear headphones in the office or gym. 11. The 180° adjustable earbud design allows you to adjust the angle to fit your right or left ear. 12. You can also move the cantilever microphone up and down so people can easily determine if you are on the phone. 13. Increase capacity to ensure maximum usage time (when fully charged), it will display the meter on the smartphone to remind you to charge quickly next time.