All Leitner Wireless Office Headsets Are Compatible With The Leitner Electronic The Leitner Electronic Hookswitch isn't just any old cord. It gives you the freedom to answer and end calls while away from your desk. Why is this useful? While everybody else is sprinting back to their desk to answer the phone, you'll be in the breakroom pouring coffee. You can effortlessly take your calls 350ft away. Does it work with my phone? See the table below for phone model information. Compatible Phone models Polycom SP IP320 Polycom SP IP321 Polycom SP IP330 Polycom SP IP331 Polycom SP IP335 Polycom SP IP450 Polycom SP IP550 Polycom SP IP560 Polycom SP IP650 Polycom SP IP670 Polycom VVX101 Polycom VVX150 Polycom VVX201 Polycom VVX250 Polycom VVX300 Polycom VVX310 Polycom VVX400 Polycom VVX401 Polycom VVX410 Polycom VVX411 Polycom VVX500 Polycom VVX501 Polycom VVX550 Polycom VVX600 Polycom VVX601 Polycom VVX1500 Don?t have a Polycom phone? See below for other makes and models For Avaya phones - Leitner Electronic Hookswitch for Avaya phones. Works with LH280 and other Leitner wireless office headsets For Panasonic phones - Leitner Electronic Hookswitch for Panasonic phones. Works with LH280 and other Leitner wireless office headsets For Siemens Aastra phones - Leitner Electronic Hookswitch for Siemens Aastra phones phones. Works with LH280 and other Leitner wireless office headsets For Cisco phones - Leitner Electronic Hookswitch for Cisco phones. Works with LH280 and other Leitner wireless office headsets For Shoretel and select Avaya Product Features Answer and end calls away from your desk at the touch of a button WITHOUT that bulky handset lifter Range? The hookswitch has the same amazon 350ft range as your Leitner headset Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!