Plantronics® Coiled extension cable for M12/M22 amplifier to phone is compatible with IP phones and modems. Cable features 1 x 4-pin RJ-11 male connector on the first end and 1 x male proprietary connector on the second end.

• Connector on first end: 1 x 4-pin RJ-11 male
• Connector on second end: 1 x Male proprietary connector
• Conductor: Copper
• Device supported: Phone/modem
• Compatibile with Plantronics amplifier M12, M10, M22
• Old part# 40974-01, New HP part# 85R25AA