OvisLink headset compatible with all telephones with 2.5mm headset jack.

OvisLink Professional call center headset services you with all-day comfort and superior sound quality. With its lightweight over-the-head single leatherette earpiece design, you may wear it all day and feel comfortable. Its noise-canceling microphone reduces electronic noise while giving you crystal clear phone calls. The microphone boom can be rotate for placement on either the left or the right ear. Headset size can be adjusted base on size of the head. It comes with a tangle-free coiled cord and shirt clip. Quick disconnect cord gives the user convenience. Compatible with telephones and IP Phones with 2.5mm headset jack

Noise-Cancelling microphone
Built-in Acoustic Shock Protection, to prevent electric overload. (When the electric overcharge signal of 6v above comes to the receiver, it will be cut off automatically.)
Single earpiece leaves the other ear free
Soft, cushioned leatherette earpiece is super-comfortable
Flexible microphone boom
Adjustable headpiece
Headpiece has extra-wide rest for non-earpiece side
Click-Stop Headband and boom
RF-Shield
Durability
2.5mm Quick Disconnect cord
Compatible with: Telephones with 2.5mm headset jack
Upper Cord Length: 34 inch
Bottom Quick Disconnect Cord Length: 29 inches, Stretchable Length: 72 inches
Durable
2 Year Warranty
Different between OVHS072-25 and OVHS072-ATT: OVHS072-25's speaker volume are louder

Single Ear Call Center Headset with 2.5mm quick disconnect cord