Quantity   Component name
1 × DSP Chip
1 × Bluetooth Module
1 × Enclosure Ears acting as audio horns to focus signals to two microphones while allowing rain or moisture to escape
1 × Battery pack
1 × Microphone Electret type probably. Linear response required in the ultrasound band.
1 × Band pass filter Cut out signals not required
1 × Amplifier
1 × Power supply module
1 × adaptor to suit 1/4-20 bolt To enable tripod mount operation for long duration detection