Product details:

Be available for every call. Enjoy superior wireless connectivity with a range up to 100 meters/330 feet and all day battery life. Crystal-clear calls even in the busiest office. Advanced noise-cancelling microphone and enhanced speakers deliver crystal-clear calls even in noisy offices. Stay focused on the Caller. Overcome interruptions with an integrated busy light that acts as a do-not-disturb sign for colleagues. Take calls from up to five devices. Can connect to up to 5 phones simultaneously including desk phone softphone and smartphone/tablet. Three ways to wear. Choose from Earhook headband and neckband styles.