This set includes two parts: | #1. An on/off switch with phone cords coming out of each side | #2. An adapter to add it to your existing phone cord | Just connect it to your phone cord, then flip the switch to turn your phone on or off during naps, meals, etc. | Works with landline and cordless phones. | Works with faxes and all-in-ones. | Please note: If you have two phone numbers, this switch will only disconnect your main number. Your second number will continue to receive calls.