A pneumatic paintball marker has, for example, a sleeve that controls the passage of air through the longitudinal barrel or opening within the marker. The screen image obtaining unit obtains a screen image including an icon. Movement of the spring adjuster absent movement of the actuator and the tripping member results in a change in the bias spring force and no change in the position of the tripping member, and movement of the tripping member absent movement of the spring adjuster results in a change in the position of the tripping member and no change in the bias spring force. The user can directly select a counterpart and the call type to be sent to the counterpart by selecting one of the call distinguishing icons displayed on the display unit.