poly SupraPlus™ Monaural Earmuff Voice Tube Headset, <100 Ohm (Transmit), 150 Ohm (Earphone)

SupraPlus works with existing Plantronics adapters, which further enhance sound quality with SoundGuard Plus™ and Call Clarity™. SupraPlus also connects directly to many leading phones, including VoIP phone systems, to offer adaptable, hands-free communications. The all day wearing comfort of SupraPlus is unsurpassed. All models are lightweight and feature single cable connection, with monaural versions featuring an enhanced T-pad design for natural support on the head. Listening comfort is assured through wideband frequency response giving a clear natural sound, which also ensures improved accuracy in your conversations.
Features
• Wideband frequency response for a more natural sound
• New T-bar support and floating receivers for all day wearing comfort
• Lightweight, stylish and modern design
• QuickCall feature short call convenience
• Robust design and construction for exceptional reliability
Specifications
• Sensitivity: -39 dBV/Pa at 1 kHz (Transmit), 15 dBPa/V at 1 kHz (Receiver)
• Frequency Rating: 200 to 4000 Hz (Transmit), 100 to 4000 Hz (Receiver)
• Impedance: <100 Ohm (Transmit), 150 Ohm (Earphone)