Pettersson D240x

Heterodyne and Full Spectrum Time Expansion Bat Detector The bat detectors from Pettersson Elektronik are high quality instruments, designed in close cooperation with leading bat workers for optimum performance in full spectrum recordings. As a testament to Pettersson's "done right the first time" philosophy, this is one of most longest-lived products in the Pettersson line introduced around 2003 and still holds it's value today. Two detectors in one! Select between HET or TE audio technology at the flip of a switch. A backlit, digital display shows tuned HET frequency. This is used when actively monitoring bat activity so you can hear in real time when the detector is receiving a strong bat call. Listen to the HET output in real-time for the ideal bat pass while the D240x simultaneously records the full spectrum (10-120 kHz) sound. When a suitable, desired bat has just passed by and the HET clicks are starting to fade, single-handedly stop the full spectrum recording with a button p