With Model Z-TZEMT400AB3NX, users can remotely control heating and cooling system via Virtual Keypad App, which is downloaded to smartphone or mobile device. In addition to by-degree temperature control, users may also select Heat, Cool, Auto, Fan, or Off. Once customers begin using Favorites on Virtual Keypad App, they will be able to assign multiple Z-Wave devices to single command. Z-Wave requires 738Z Z-Wave module and supports 232 modules.