Jabra EVOLVE 40 stereo headphones, MS, USB & 3.5mm jack

Jabra Evolve 40 are USB Stereo headphones with a built-in 3.5mm jack that allows easy connection to your computer, smartphone and tablet. 

Audio features include passive noise-canceling headphones, a noise-canceling microphone, Digital Signal Processing (DSP) technology and crystal-clear wideband sound. 
Jabra Evolve 40 are equipped with a control panel with a call button that allows you to conveniently answer and end the call, mute and control the volume from the headphones. 
The fully adjustable headband, leather ear cushions and lightweight design make the Jabra Evolve 40 very comfortable and suitable for extended use. 
The noise-canceling microphone can be tucked into the headband when you just want to listen to music.
Jabra Evolve 40 is Microsoft Lync certified for Skype for Business.

Features:
Headphone bandwidth: wideband;
Speaker size: ø28x3.9mm;
Speaker Sensitivity: 93.6dB SPL @ 1kHz;
Speaker Impedance: 32+/-4.8Ω, @ 1.0kHz;
Maximum speaker input power: Rated input power 5mW at 0.4V, maximum input power 10mW at 0.56V;
Speaker Frequency Range: 150Hz~7kHz, @ Output SPL -10dB;
Frequency band of the speaker - music mode 20Hz-20.000Hz;
Speaker bandwidth, speaking mode: 150Hz~7kHz, @ output SPL -10dB;
Microphone type: electret condenser (ECM);
Microphone sensitivity: F=1kHz, pin=1Pa, 0dB=1V/Pa, Min=-48dB, Max=-44dB;
Microphone frequency range: 100Hz ~ 10kHz @ 6dB;
Microphone Bandwidth: Wideband;
User hearing protection: Jabra SafeTone™ **;
Certifications: Regulatory Approvals: CE, FCC, KCC, RCM, Industry Certifications: Microsoft Teams*, Avaya, Cisco and others;
Warranty: 24 months