No, it does not require batteries. It operates using 'Plug-in Power' supplied directly through your camera's 3.5mm microphone input jack.
Yes, but it requires a TRS to TRRS adapter (like the Rode SC7) and potentially a Lightning or USB-C to 3.5mm dongle depending on your phone model.
Yes, it features an integrated cold-shoe mount with a 3/8" thread for easy attachment to cameras, tripods, or boom poles.
Ensure your camera supports 'Plug-in Power' via the mic jack. Some older or entry-level DSLR models do not provide the necessary voltage to power the microphone.