Finally just one headset that can be used for virtually any type of call, anywhere, created for the mobile professional. You can use the Sennheiser VMX Office headset with your office desktop phone (wirelessly up to 100 feet!) and mobile phones, as well as alternative telephone types such as smart phones, soft phones, etc. Needless to say, the VMX Office is compatible with all your voice-enabled Bluetooth devices like PDAs and even VoIP-enabled computers or laptops