70以上 １／４－２０unc 305812-1/4-20 unc drill size
(continued) Attach a tripod (1/4-UNC size) to use the unit in a fixed positionConnect to a computer to check and use data on the SD card(L = low sensitivity, H = high sensitivity, AUTO = automatic) Input sound from an external device 1 4 Unc Stainless Steel Hex Nut 1/4-20 unc drill size