In some examples, an electronic device may provide haptic output associated with a gesture for performing a task using the electronic device. Working conditions for each construction machine are set up by a working conditions setup means, including a geographically divided working area and a working time zone in which a construction machine is allowed to operate in a specified working area. This allows clock synchronization and skew adjustment circuits to be implemented in an optimized manner that exhibits a reduced overall circuit size and power consumption, while having improved lock characteristics over a wide range of frequencies. The communication services available through the Web interfaces are provided by a plurality of different service providers with whom the reseller of communication servers contracts. The electric motor torque control unit controls the electric motor so as to limit the torque of the electric motor to or below the limit value.