A multiple clip fastener for securing sections of hair of a human being in rows and for aligning hair clips. In the transmission power control system the base station comprises control means for controlling initiation of a balance adjustment period for performing the balance adjustment from a frame number determined on the basis of frame number of the balance adjustment period. The resulting signal is detected by the receiving unit and analyzed to determine whether the differences between the resulting signal and a stored pre-defined signal indicate the detection of echo cancellation on the communication network. If degradation in call quality is detected, the GUI module presents an interface to the user that allows selection of the secondary network or the primary IP network for continuation of the call. Latencies can be determined using a scaling parameter that is calculated from a history of the image signal.