... soundbox, power supply module and acoustics shielding system etx.Thickness: 1.2mm, 1.5mm, 2.0mmCopper Foil thickness: 18um, 35um, 70umBoardsize: 600mm ... (25°C~65°C,RH:90%~98%,20 circulate)4.5×1067Volume ResistivityAMΩ 1.0×108Constant humidity treatment(25°C~65 ... °C,RH:90%~98%,20 circulate)1.9×1078Dielectric Breakdown AC(leakage 5mA)KV49Dielectric constant(1MHZ ...