DH-037T headset Stay-put click-stop headband for perfect fit. It's smart headset investment decision that doesn't compromise on sound quality and durability. Technical Specifications • Wearing Style: Over-the-Head. • Cord Length: Cord Length: 3 meters including the bottom cord. • Connector type: Standard RJ9/11 modular jack, Optionally 2.5/35mm plug and USB connector. • Quick Disconnect type: Plantronics type • Weight: 53g • Compatibility: Work with all kinds of Single or Multi-line phones, DECT and IP Phones • Microphone: Noise cancelling with Static shock protection • Mic boom Arm type: Flexible PE bar • Earpiece: Fitting with Leatherette cushion, Foam Cushion as the spare. • Color: Charcoal Grey • Warranty: 2 years • Compliance: RoHS • Approval: CE, FCC, ACME • Optional materials: Headset Hanger, Headset pouch, Leatherette or Foam cushion Types of Quick Disconnect Bottom Cord - 2.5mm Quick Discount Cord for Panasonic DT-543/ 546/ NT543/ NT553/ 556 Polycom IP330/ 331 Deskphone . - 3.5mm Quick Discount Cord for Alcatel4028/ 4038/ 4068 Deskphone. - Black Tube Quick Discount Cord for Avaya 16xx/ 96xx Grandstream 1610/ 1710/ 2130/ GXP2124/ 2130/ 2140/ 2160/ 2200/ GXV3240/ 3275 Yealink T26 Deskphone - Blue Tube Quick Discount Cord for Aastra 6771/ 6773/ 6775 Ericsson-LG LIP-9010/ 9020/ 9030/ 9050/ 9071 Mitel 5360/ 5370/ 5379IP/ 5380/ 5380IP/ 7434IP/ 7444IP/ 6940/ 6735I/ 6737/ 6739IP/ 6753I/ 6755I/ 6757I Polycom VVX 410/ 501/ IP 550 Deskphone - Red Tube Quick Discount Cord for Cisco 7924G/ 7945G/ 7965G/ 8811/ 8841/ 8845/ 8851/ 8911/ 8911/ 8941/ 8945/ 9971 IP Phone.