Combines heterodyne and time expansion
The Pettersson D-240X is a fantastic choice for the advanced user. The combination of heterodyne and time expansion methods means that calls can be listened to as well as analysed later for accurate species identification. Available on its own or as a complete bundle containing everything you need to record using this detector.
Use this cable to connect your D-240X to a hand-held recorder
This BatSound software from Pettersson is a powerful tool for the analysis of bioacoustic sound and is particularly useful for the study of bat calls
A 9V battery to power the D-240X detector
If you are interested in a detector for long-term, unattended deployment then the D500X is a great alternative