| 摘要 |
A warning unit for attachment to a handheld firearm comprises attachment means for attachment to a firearm, a light source, and digitally manipulable input means operable to enable selection of a mode of operation. The warning unit is capable of being operated in at least a narrow divergence mode, and a wide divergence mode wherein, in the narrow divergence mode, the warning unit is operable to emit a beam of light of a lower divergence than in the wide divergence mode.
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