An electronic device such as an accessory-mountable robot is provided. The electronic device changes functional properties thereof in accordance with a mounted accessory. In an embodiment, the electronic device detects mounting of at least one accessory and identifies accessory characteristics associated with the at least one accessory. Then, the electronic device determines properties of the electronic device associated with the at least one accessory, based on the accessory characteristics, and changes the properties of the electronic device, based on the determined properties. Also, the electronic device outputs at least one of a visual element, an auditory element, or a tactile element associated with the at least one accessory, based on the changed properties.