Device having integrated interface system

There is provided a device (100) comprising: a display portion (102) comprising: a display housing; and a display within the display housing. The device further comprises a base portion (104) flexibly coupled to the display portion and comprising: a bottom case; a top case (112) formed from a dielectric material and defining, along an exterior surface of the top case: a keyboard region (114) configured to receive a first user input; and a trackpad region (116, 3102) configured to receive a second user input. The base portion (104) further comprises an input sensing system configured to determine a location of a touch input applied to the trackpad region (116, 3102); and a hand presence sensing system configured to detect a presence of a user's hand over the keyboard region (114). The device (100) further comprises a processing system operatively coupled to the hand presence sensing system and the input sensing system and configured to, in response to detecting the presence of the user's hand with the hand presence sensing system, change a mode of operation of the input sensing system.