A wheel mouse includes a mouse case, a base, a circuit board, an encoder, a fixing element, a wheel, a switch element and a spring. A third signal can be generated that accounts for channel characteristics on the transmitted first signal. The message and the current location of the first device are sent to each of the second devices associated with the selected one or more users. The bond cap includes oppositely oriented leg members bonded to the respective rearward edges of the shell members so as to be essentially flush with the upper and lower shell members.