Some of the key characteristics of Embedded Systems are as mentioned below.

• All Embedded Systems are task-specific. They do the same task repeatedly /continuously over their lifetime. An mp3 player will function only as an mp3 player.
• Embedded systems are created to perform the task within a certain time frame. It must therefore perform fast enough. A car’s brake system, which exceeds the time limit, may cause accidents.
• They have minimal or no user interface (UI). A fully automatic washing machine works on its own after the program is set and stops once the task is over.
• Some embedded systems are designed to react to external stimuli and react accordingly. A thermometer, a GPS tracking device.