You can request the temperature anytime when the power is presented. When the power is failed the unit will sleep. There is a small battery inside the unit so you can't monitor the temperature all the time when no power. However there will be a software update in Q2 2021 where we will add a facility to monitoring the temperature in a smart way during power outages - you will be able to configure how often the unit should wake up to probe the temperature and thresholds against which it should probe it. When it breaks thresholds you will get a notification. This way the temperature can be monitored one or two days if wake up interval is reasonable (about every hour). Probably it will be longer, we don't know - we are testing this feature and it will be release in the future with no extra fee if you already have the sensor and essential temperature option in your plan.
You can turn on or turn off your air conditioning system remotely with iSocket only if your appliance has a plug. Most air conditioning systems are wired directly to an electric cabinet and have a remote controller to regulate the temperature. You cannot connect the remote controller of such an appliance to iSocket, but if the equipment has a plug you can connect this plug to the iSocket, and set up your air conditioning system to the desired temperature and shut it down (turn off the power supplied through the iSocket to the plug of the appliance). You can then switch it on remotely before arrival. Please note, this option might not be recommended by the manufacturer of the equipment. You do this at your own risk.