Truly wire-free--no wires connecting earbuds to playback device or between the ears ; Amazing stereo sound ; 10 mm drivers; Built-in microphone for making phone calls with paired smartphone; Wearer presses Function button once to answer; twice to reject ; When in calling mode, only master earbud will have sound--this safety feature allows user to hear the traffic while driving; 1-button control ; Super lightweight and sweatproof; Bluetooth(R) V4.2 ; Frequency range: 20 Hz to 20 kHz ; Transmitting distance: 32.8 ft. ; Up to 2 hours music and talk time; Up to 120 hours standby time; Impedance: 32 ohms ; Sensitivity: >85 dB ; Distortion:
Warranty: Ninety Days
Country of Origin: China