External light type Rescue-Master 2B: The light has two parts, a battery and lamp, which can be supplied separately. The lead length on the lamp is custom made. The light flashes to reduce battery power and heat from the lamp. The lamp exceeds light intensity requirements of 4.3cd for 12 hours. The battery is automatically activated when the activation pin is pulled out of the battery during inflation of a life raft. Classified as Hazardous for Shipping Purposes – See PSDS External light type Rescue-Master 3B: The light is identical to Rescue-Master 2B, but has a larger battery housing. Classified as Hazardous for Shipping Purposes – See PSDS