the gn 9120 is a wireless headset that works the way today's office professionals work. offering an unbeatable range, a robust talk time of up to 12 hours and a host of innovative features and benefits, the revolutionary gn 9120 will take you far. the unique conference call feature lets you hold fully mobile, secure conference calls not restricted to meeting rooms. and the gn 9120's three different models, equipped with different microphones, will suit any office environment.