different colors may be emitted from the hole 206 thus the wearer of the watch 2 may determine the type of the incoming messages by the color emitted from the display area 202 without the need to turn on the entire display 207 of the watch 2 since the entire display 207 does not have to be turned on to make the wearer determine the type and possibly importance of the incoming messages the battery life of the watch 2 can be extended in some embodiments the display area 202 is an arc on the sidewall 205 the length of the arc may be adjusted according to different needs in the embodiment of fig2 the display area 202 takes the shape of an arc with a length less than the distance between the two lugs 203 in some embodiments the length of the display area 202 may be much wider up to i e the circumference of the case 201 in which case the display area 202 becomes a ring the display 207 may display numerals indicating the hours such as arabic numerals e g 3 6 9 and 12 and roman numerals e g iii vi ix xii indices may replace numerals to indicate the hours in some embodiments numerals and or indices are additionally arranged on the display 207 instead of the display 207 displaying numerals and or indices in the embodiment of fig2 the display area 202 comprising the hole 206 is arranged on one side of the case 201 near the six o 39 clock sign between the lugs 203 in some embodiments the hole 206 may be filled with a material that is at least.