This is a Plantronics EncorePro HW540-Avaya 1600, 9600 phone Certified headset.  Compatible with Avaya J139, J159, J169, J179, J189, 1608 1616 9601 9608 9610 9611 9611G 9620 9620C 9620L 9621 9630 9640 9640G 9641 9650 9650C 9670.  Plantronics HW540-Avaya has a 3-in-1 headset design (3 different styles you can choose from).  If you don't like one wearing style, you can easily switch to another.  HW540-Avaya is designed with quality and for all day comfort.  All 3 styles is simple to convert and is secure to wear with any style you choose. The Plantronics HW540-Avaya provides high--quality audio, a flexible microphone, soft ear cushions, and super durable and lightweight materials for all day use. Retail Price $165.00

Avaya Certified Compatible  phones*:
 

J139, J159, J169, J179, J189
1608, 1616
9601, 9608, 9610, 9611, 9611G, 9620, 9620C, 9620L, 9621, 9630, 9640, 9640G, 9641, 9650, 9650C, 9670

*Do not order this headset if your model is not listed.

 Key Features:

• Includes cable for the Avaya IP telephones (connect directly to the headset jack) - No amplifier is needed for your Avaya Phone

• 3 wearing styles - over the head, on the ear, and behind the head.

• Plantronics HW540-Avaya is lightest in its class.

• Plantronics Quick Disconnect (QD)

• Noise canceling microphone

• Wideband audio delivers richer, clearer conversations

• Plantronics 2-year warranty

For more detail information see Plantronics HW540 datasheet

Plantronics HW540-Avaya optional parts:

Plantronics HW540 Ear Loops (small and large)