Hi Marvin, there is a fan inside, but it is quieter than my NAS. However, switching to battery is clearly audible (several times a day for me). The behaviour of the display cannot be influenced, not even by APC software ... but it switches off automatically. Unfortunately, the shutdown only works via USB. The network connections cannot be used in this way. I have connected the UPS to the NAS via USB and shut down my WIN server from WinNUT. MfG digimouse