Give it all youve got. The GLXD14/SM31 Wireless System can handle your most intense workouts. The SM31 Fitness Headset is made from corrosion proof materials. You can sweat on it. Shout into it. And it will perform just as you need it. And its been fused with elegant GLX-D technology – for wireless freedom you can really trust. Setup is simple. Intelligent LINKFREQ technology finds the best frequency for your performance. And if competing signals are detected from nearby Wi-Fi and Bluetooth devices your receiver will automatically switch to a new clear frequency. Its totally seamless with zero interruption to the audio. Just fault free performance every time you workout.