caregiver pager system 1 watch call button and 1 receiver easy to use for elderly/patient home nursingFeaturespager system call bell working voltage: 90V-260Vspecification of waterproof remote call button battery: CR2032 3V button batterycaregiver call button system operating range: 500+ Feet in open areareceiver part have 5 level Volume and 52 Ringtone for your choice, Default tones is Ding-Dongmodern and stylish designportable and easy installationone call button could call multiple receivers at the same timePackage1 receiver, 1 call button, 1 user manualNoteThe call button requires 2 CR2032 button battery which is already included and not rechargeable, If the signal getting weaker, remember to change a new battery