Built in microphone and automatic call notification.
Driver unit: 40mm
Frequency response: 20-20,000Hz
Bluetooth Freq: 2402MHz - 2480MHz
MIC: OMNI Directional, -58+/-3dB, 50Hz - 15KHz
Range: 10 meters
Talk/Music Time: ~45 Hours
Standby Time: ~30 Days
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