... many functions, convenient and quick, -DND, clean, wait, check out, SOS information real-time showed at PC 1. greatly improve the ... will enter into working mode.-DND, cleaning, wait, check out, SOS services request information notice to the front desk real-time ... enter/exit infothe Guest identityDND, clean, wait, other service request, SOS will real-time response;real-time detection the operation status ...