HL10 LIFTER,STRAIGHT PLUG,US: for use with Savi headset lifter--- fits on your telephone, letting you answer calls with the touch of a button, conveniently and automatically takes your handset off hook. Automatically lifts handset and returns it to the cradle, Enables remote or one touch call answer/end with your Plantronics headset, Works with all Plantronics wireless office headset systems, No desktop footprint, Compatible with most standard desktop phones, Fast operation . Plantronics