Jaybird RUN true wireless earbuds give you a secure comfort fit, no matter the shape of your ear, with interchangeable tips and fins Sweat all you want, push yourself in the rain, and get muddy; Jaybird run running headphones are Sweat proof and water resistant You can customize your sound by adjusting the lows, mids, and highs to pump up your true wireless Sport experience; The Jaybird app can locate your buds if they go missing; Impedance 16 Ohm.Speaker sensitivity 103 +/ 2dB at 1KHz.Output max; 12mW RMS (with level limit) 12 hour battery life in your pocket and fast charging on the go: true wireless earbuds make running with music feel Limitless; 4 hour play time + 8 hour charge case; Output: 12mW RMS (with limit level) Jaybird run gives you true wireless earbuds with a mic and a single control button, so you can power your run without breaking focus NOTE: Refer the User Manual before use