Signal sequence detection techniques are provided to enable a wireless communication device to detect presence of a sequence, such as a preamble sequence, in the presence of other transmission that would otherwise interference with the ability of the device to detect the sequence. Moreover, the device has detachable mechanical connections of certain parts such that said same device can be used selectively in combination with the toy weapon and as an autonomous and portable entity with handgrip, for pointing of the same toy weapon, for lighting andor as indicator light. The second laser is then positioned with respect to the strip and, with the second laser, the method then includes laser machining tab portions connecting parts to the strip in sequence along the strip, and separating the laser machined parts from remaining portions of the strip. Said printed circuit boards may be included in a charger device and a user device. Subsequently, when the mobile terminal is located at the area zone specified by the identification information, communication quality between the mobile terminal and the radio base station is measured by the mobile terminal, and the quality information indicating the measured communication quality is transmitted from the mobile terminal to the radio base station.