PHONE Only Model, NOT for Computer.Please contact [email protected] for any support or questions.EVEN IF you are far from a Desk Phone, when an incoming call, you hear melodies in your ear cordless headset, and you can answer the call if you press the call button on the ear headset.INNOTALK wireless headset with the INCLUDED Electronic Hook Switches (EHS) enable you to roam your office while you talk with and Answer incoming calls within reachable MAX 300 FEET cordless range(Max. may be reduced by your environment).NOTE 1: BlueTooth Headset ONLY Less 100 feet.NOTE 2: HANDSET LIFTER Wireless headset like Plantronics CS540 with HL10 is HARD to install on These Phones due to the Phone Handset Shape.* IMPROVE PRODUCTIVITY as you're able to gather information throughout your office while continuing to talk.* NOISE CANCELLING MICROPHONE filter out background noise* DIGITAL Signal Processing/DSP makes Outstanding Sound Quality and also eliminates Wi Fi interference and Acoustic protection to protect Ears.* INCOMING call notification and One-touch call answer/end button, volume control with mute, manage calls within wireless range from the charging base* CHANGEABLE headset color to Black / Wine color.* MAX 8 HOURS TALK Time (It will be reduced when operating in high speaker volume or Calls at a long distance, in a state such as a radio wave blocking environment).This best cordless headset for office phone compete with Plantronics cs540, cs50, savi, Jabra pro 920 mono wireless headset.INNOTALK also offers the HANDSET LIFTER DL570 ( B015JBCGO2 , sold separately) like HL10 for working as a Wireless Headset Compatible with Avaya, Cisco and Most desk/office phone to complete your wireless headset system.