Features Jabra PRO 920 is a professional entry-level wireless headset designed for use with desk phones. The robust Jabra PRO 920 offers all the essential features of a wireless headset in a simple design at an attractive price point. Specifications Crystal clear sound and safe sound levels Soft, comfortable ear cushions Noise-cancelling microphone Dedicated button to answer/end calls Separate buttons to mute call or turn volume up or down Adjustable headband for a perfect fit LED display with Battery, Mute and Audio link indicators Headset battery is not replaceable