An electronic device includes an adjustable mechanism disposed at a front end of a housing body thereof. The adjustable mechanism includes a foot pad extending through the housing body, and movable relative thereto between a retracted position, where a bottom of the foot pad is higher than that of a docking station, and an extended position, where the bottom of the foot pad is at a same level as that of the docking station. A movable engaging hook is mounted slidably on an inner side of the housing body, and is partially exposed from the housing body. The engaging hook engages the foot pad when the engaging hook is at a limiting position and when the foot pad is at the retracted or extended position, and disengages the foot pad to enable the foot pad to move between the retracted and extended positions when at a free position.