Place the DHL110 Handset Lifter on the speaker of your desk phone underneath the handset and lightly stick the Lifter to your phone. Test the Lifter by turning your headset on and off to see if your phone properly picks up and hangs up. NOTE: Each phone is designed differently so the placement of your Handset Lifter varies. Keep adjusting until the phone will engage and disengage your phone calls, then firmly press the Lifter down to ensure the double sided tape sticks as long as possible.