The set consists of: SB/BB/TOP lanterns. Waterproof with reflector on SB and BB and click mounting. Used on dinghies and inflatable boats, as well as emergency lanterns. Can light up to 9 hours. Uses 1 pc. LR20 (ICE no.: D) battery per Lantern. Accessories: Battery type LR 20 1.5 volts (ICE no.: D).