... startup: polar-reverse, 12 / 16kHz pulse, manual or delay automatically6) Identifies call number automatically and the tolerance ... sum, duration and other related information.2. Large LCD screen displays status of the corresponding port: on/off-hook ... high temperature, dust, alkali, acid, strong vibration situation or strong electromagnetic wave.Atmospheric pressure:86kPa~106kPaRelative Humidity: 10 ...