g from the first position to or towards the second position relative to the display screen 250 displacement of the key cap 100 e g from the first position to or towards the second position can be controlled or effectuated by a user the resistive force provided by the key cap 100 in association with upon or during user controlled or user effectuated displacement of the key cap 100 from the first position to or towards the second position provides the user with a tactile feedback that is associated with the key cap 100 displacement this tactile feedback associated with key cap 100 displacement or movement gives or provides the user with a measure of confirmation or knowledge of user 39 s input more specifically user effectuated actuation or displacement of the key cap 100 the tactile feedback is facilitated by way of a linking mechanism which will be discussed later the actuator 240 is also for biasing the key cap 100 towards the released position first position for example when the key cap 100 is depressed second position the actuator 240 can act as a spring to bias or actuate the key cap 100 towards the released position first position in some embodiments the circuit module 200 can comprise a magnetic structure 260 for repelling the key cap 100 away from the second position to thereby bias the key cap 100 towards the first position as discussed above the ability for light transmission through the light permeable region 150 allows images displayed on the display screen 250 to be seen or viewed via an opening 230 by a user more specifically an area or portion of the display screen 250 that corresponds to e g is located or disposed directly underneath said light permeable.