✔ 最佳答案
Despite that the instructions are strictly followed and numerous vain attempts have been made to check whether the equipment is still usable or not, with no exception, the screen freezes at the language select menu and the usage statistics panel.
Furthermore, the specifications of the equipment (Power Cumulated Time: 114h:21 /Standard koolburst # of shots: 88250) are not consistent with those specified in the information I got before my purchase (Power Cumulated Time: 630h:10 /Standard koolburst # of shots: 226284).
It is unacceptable that the equipment fails to function properly and this completely disappoints me. Therefore, I would have to return the equipment and request a refund.