The Plantronics 86890-01 M55 Bluetooth wireless headset lets you do more with your voice – answer calls without pressing buttons or use the Vocalyst service to manage emails. DeepSleep mode lets the M55 stay charged for up to five months, so it’s ready when you want to hear music, Internet radio, or simply take a call. Plantronics DeepSleep power-saving mode activates when your M55 is away from your phone for over 90 minutes. When it’s back in range (33 feet or less), you can just tap the Call button to "wake" it up. Multi-point connection pairs and maintains connection with two phones so you can answer calls from either phone. This hands-free bluetooth headset lets you use your voice wisely.