Power off memory; Retekess TH109S wireless calling system maintains the settings through power failures; allowing for seamless continuation of emergency preparedness; continuity of settings even during unexpected power outages ^^ Two charging options; the convenient charging base ensures a quick and easy recharge; while the universal type-c port caters to convenience; making the wireless call bell system effortless to stay powered up in diverse situations ^^ Different ringtones; the nurse alert system featuring 18 specialized ringtones organized into 6 intuitive categories; the versatility of these tones allows for assigning specific alerts to various threats; ensures immediate recognition and response ^^ Volume adjustment; the caregiver pager boasts a versatile volume system; ranging from 0db to a 120db; transforming the emergency calls into unmissable alerts; command immediate attention ^^ Easily portable; boasting a lightweight design and included accessories like a base; clip; and lanyard; ensuring never without a way to call for help