Manufacturer Keri Systems Incorporated Model TDK500 2-Door Distribution Kit Dimensions (Enclosure) 13″ H x 9″ W x 4″ D (33.15 cm x 22.95 cm x 6.35 cm) Dimensions (PC Board) 5.6″ H x 6.6″ W x l.6″ D (14.28 cm x 16.83 cm x 2.55 cm) Reader Type MS-3000 MicroStar Proximity Readers Power Requirements 12 VDC / 2 AMP, Battery Ready Temperature/Humidity 32F to 140F (0C to 60C) 0-90% Non Condensing Communication Between Controllers: RS-485, 9600 Baud PC to Master: RS-232 Warranty Limited Warranty Weight 20.0000