Manufacturer Altronix Model ACM4 Dimensions Board: (approximate): 3.37W x 5.175L x 1.25H Output Voltage 12 to 24 volt AC or DC operation (setting not required) Inputs Four (4) Access Control System trigger inputs Outputs Four (4) Access Control System outputs U.L. Listed UL Listed Sub-Assembly for Access Control Systems (UL294) Warranty Lifetime Warranty Weight 0.5000