Plantronics HW510V headset with voice tube Can be connected to landlines and notebooks SoundGuard technology protects you from sudden loud noises and limits the average noise exposure Wideband audio for exceptional voice clarity Soft ear cushions for all-day comfort Weight: 50 g Connecting the headset requires a connection cable OR amplifier Neither option is included and both must be ordered separately. Please note that the required connection cable varies by phone. Please specify your phone model to enable us to provide the correct cable. The amplifier does not require an additional connection cable.