Features: Clear Sound - Noise reduction feature prevents outside noise and provides clear sound when making a call.Speed Dial - This wired phone with speaker uses speed dial groups to store frequently used numbers in times of emergency.Wired Phone - Wired phone is designed with dual interface which can connect both the phone and the power tap or internal wire, POS and fax machine.Caller ID - Caller ID function displays caller number to avoid unjammed calls.Make a phone call.Mute Function - Mute function helps protect yourself and your secret when you dont want to hear the other one while you call.Very reliable.Pause/Pause Function--If you need other small things when you answer a call, you can pause or pause the call by pressing the button.Next, press or hold the button to continue communication.LAST NUMBER - If you suddenly hang up a call, you can immediately use the last number function to continue your business.Very practical.NO BATTERY - NO BATTERY NEEDESave energy, easy to use.