The Sennheiser VMX 100 is an over-the-ear Bluetooth headset ergonomically designed with a unique 3-D swivel ball joint and is available in Titanium finish or Black. Talk time is 5 hours while standby time is 100 hours and a USB cable is also included. Headset controls include volume adjust, call answer/end, and automatic power off/on when closed/opened. ActiveGard protection prevents sudden loud burst of noise and VoiceMax Dual Microphone technology is also included, which employs a unique directional system using two microphones and advanced digital signal processing to distinguish speech from other noises.