It operates at 44.1kHz. I can’t measure the bit depth accurately but the noise floor isn’t low enough to go beyond 16bit anyway (<96dB)
High frequencies are properly attenuated at ~20kHz, so no need to worry about aliasing.
H9 sounds lovely and it’s sampling rate isn’t really relevant. However it does show that Eventide lack confidence in their engineering (and perhaps their customers) that they won’t publish this information.