This SMM-U1 ultrasound microphone is for use with the Song Meter SM4BAT and SM3BAT recorders. The microphone has a Knowles FG element which provides a flatter frequency response and high sensitivity. It is also very resistant to water damage. The metal housing assists with grounding of the microphone.
The SMM-U1 is available on its own or with a microphone cable (3m and 10m versions available).
Wildlife Acoustics Microphone Guidelines