RolandSPD-1W WAV PERCUSSION PAD

Where can you find sounds to put on it?

Does it come with the AC adapter? If not, exactly which adapter does it use?

Is there "velocity" on this, or does it always play the chosen sound the same, no matter how hard you hit it?

How can I simultaneously use my click tracks via the spdOne wav pad while Im already running my tm2 triggers thru my in-ears?