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BASIC FUNCTIONS - Speakerphone with FSK/DTMF Caller ID, LCD Contrast adjustable Backlit display, Ringer Volume and speakerphone volume adjustable, noted the call volume of the handset cannot be adjusted.. MADE OF HIGH QUALITY MATERIALS - This landline cordless phone is made of high-quality ABS material, which is very strong and has a long service life. And our phone works with the phone line, no battery required, energy saving and environment friendly.. STABLE PERFORMANCE - Fixed phones are equipped with dual FSK / DTMF systems to ensure stable and clear call quality, very suitable for home or office use.. EASY TO USE - Landline corded Phone for office with Caller ID. Phone base is wall mountable for easy access. Minimal installation required, Ringer Volume Control, Fast Redial.. ADJUSTABLE FUNCTION - Corded Telephone with one Touch Memory, 1g Ring tone Selection, Tone/Pulse Selection, Local Area Code Setting.. WIDE APPLICATION - Designed with two interfaces. It allows you to connect the telephone and distribution board or extension device at the same time, such as POS machine and fax machine.