SINGCALL Home Caring Alarm System,Nurse Call,Oval Rounded Shape with Lightweight, More Convenient,Fit for Old, Patients or Children,Include A Caregiver Receiver and 2 Necklace Pagers(APE160). SC-R16:1.Red indicator light blinks with loud beep prompting, can last 15 seconds(Or press Cancel). 2.Adapted to all SINGCALL call pagers, ten pagers at most 3.External antenna, ultra long receiver distance 4.Small-sized, exquisite. With two buttons 'Initialize' and 'Register/Cancel' APE160: 1. Rounded and light, comfortable to wear 2. Dual hanging, easy to move Taking hang rope and suspension clasp as the wearing style, thus it could be hung around the neck or fastened on the waist. 3. Marked button, convenient to call Marked orange button makes the calling more convenient and it is not only fit for such kind of people, old, patients or children, but also suitable to patrol officers calling. 4. Stable signal, long distance to receive Dimensions: 3.39*1.69*0.59 inches(86mm * 43mm * 15mm) Shell material: PC(imported from German) Superficial treatment: Polishing Color: Orange Key surface materia: PC(imported from Taiwan) Installation: Wall type Power supply: DC12V/1A Power input: AC100V-240V (voltage self-adaptation) Sound length: 15 seconds Size: 2.95*1.93*0.79in(75*49*20mm) Distance: 130-200ft indoors, 1600ft in the open air Coding scheme: Registration Battery: Alkaline Battery 12V/23A Frequency: 433 MHz Deviation: 0.5 MHz