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Description: exit sign Brightness: >*0cd/m2 High quality metal epoxy spray box Simple and delicate Novel LED light guide technology uses advanced laser device Light refraction principle enhances LED providing high brightness and uniform illumination Unique constant flow pressure technology with accurate control of voltage and current promoting stable performance Patent circuit design with intelligent automatic breakdown detection and quick emergency switch times Over charge and over discharge protections High quality non-maintenance NiCd rechargeable battery series Input voltage: **0V Emergency time: >*0 minutes Charging time: <*4 hours Change-over time: <1 second Power: 8W Dimensions: **5 x **0 x *8mm