The Clipper Log Repeater has its own independent alarm function as well as repeating all data from the master unit. Technical Specifications: 40mm high digits 7 level display backlighting Complete with 5 meter cable, &';O&'; ring and weather cover Consumption 10mA + 25mA for display backlightThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications: Instrument Function: Speed Box Dimensions: 4"H x 8"W x 10"L WT: 1.6 lbs UPC: 609722886772