The only true Hand-Held Ferromagnetic Detection System (FMDS).
The rechargeable battery-operated EAGLE has the advantage of not requiring an AC power outlet, increasing the practicality of this instrument for many MRI centers. The battery-operated EAGLE is now the version of choice for most MRI facilities.
The 110v. plugin AC unit can be preferred for hospitals and facilities with high ambient noise, as it is several dB louder than the battery version.