Fire Service Model easily attaches/detaches above or below brim of fire helmets; MSA Model fits MSA Cairns 1010/1044 Traditional Fire Helmets; Industrial Model features a hard hat mount that slides into accessory slot; Safety features include a blue taillight LED so you can be seen from behind; taillight can be configured to flash or be turned off; Large push-button switch for easy on/off, even with gloved hands; Safe off feature prevents accidental activation, saves batteries; Swivel clamp to optimize beam location; Low-profile; won't snag; Durable aluminum construction that can withstand heat and smoke; Reflective strips on side of switch housing