Crown Micro Bluetooth 4.2 Earphones Bluetooth earphones featuring clear sound and comfortable design, perfect for sports. The control buttons allow you to manage music playback or answer incoming calls. Impermeable to drops of water, the Crown Micro earphones offer high resistance to sweat.     Main features Comfortable design suitable for sports Control buttons Integrated microphone Call answer function Sweat resistant Noise canceling function Maximum operating distance from Bluetooth device: 10m Earbud size: SML Cable length: 25cm Charging duration in playback: about 5 hours   Technical features Bluetooth version: 4.2 Bluetooth protocol list: AVRCP, HSP, HFB, A2DP Speaker diameter: 10mm Impedance: 32 ohms Sensitivity: ≥94dB (AT 1KHz) Frequency Response: 20Hz-20,000Hz Microphone diameter: 4mm Microphone sensitivity: -38±3dB Built-in battery: 90mAh EAN: 6941141600312