***** **********Best Quality Guranteed. *****T114 wireless calling system can bring more convenience to clinic hospital or restaurant; when patient senior or guest need help; they only need to press the help call button beside them to seek help without shouting to attract the attention of others*****The receiver host uses advanced industrial micro processor and high-sensitivity receiving technology which make the products very stable; and the working range can reach 500m or 1640ft in open area*****The nurse call system can add up to 999 nurse call buttons; and is compatible with all call buttons; you can always add more emergency call buttons for the pager system; it can meet the needs of all hospitals; clinics; emergency rooms; nursing homes*****The caregiver pager system has 15 levels of volume adjustment; supports external audio equipment; and has 3-digit LED display to display the latest call records; without worrying about missing customer call information*****6 working modes a