◆One-button pager ◆Design with square and round, flexible and simple ◆Calling by touch, easy and convenient ◆360 degree water-proof, call at any time and place ◆Simple pushing bottom shows the humanized design ◆Size: 3.4*3.4*0.7 in (86*86*17.5mm) ◆Two 12V 23A batteries ◆Suitable for the hospital, nursing home and family patients' bedside