Two Form A (normally open) relays rated at 30 Volts AC/DC up to 5 AmpsSupplied with whip antenna, three feet of coaxial cable, and bulkhead connectorMemory: storage for up to 40 MegaCode transmittersPower: 12 - 30 VAC or 10.5 - 30 VDCCodes: 1,000,000+ (MegaCode format)RF frequency: 318 MHzDimensions: 3.625" W x 5.25" H x 1.5" D