LED lighting lamps provide improved heat dissipation efficiency, wide illumination beam angles, and substantially uniform illumination intensity. Preferably, the plurality of magnetometers comprises three magnetometers aligned within the projectile, and wherein a first one of the magnetometers is aligned with a spin axis of the projectile. The jaws may be closed for cutting and treatment of the tissue. A detector unit is used for detecting signals proportional to radio-frequency signals propagating in the signal path.