Get the most from your headset by adding the ability to remotely answer and end calls. Lifter provides simple, one-touch answer/end operation using your headset's talk button. Easy-to-install--up and running in minutes. Compact, unobtrusive unit leaves no desktop footprint. Devise is designed specifically for use with Plantronics® cordless headset systems and is compatible with most standard desktop phones. For Use With: Plantronics Telephone Amplifiers Plna20, Plns20, Plnca10, Plncs10, Plncs50.