Jaybird RUN True Wireless Headphones,Secure Fit, Sweat-Proof Music+Calls
Sweat all you want, push yourself in the rain, and get muddy. Jaybird run running headphones are Sweat-proof and water-resistant and sensitivity is -38dB +-3dB (test conditions- 1KHz, 0dB = 1V/Pa),frequency band is 2.4 GHz.