This Audit Trail accessory prints the event log and user code with hand-held convenience. PC-interface cable interconnects locks and PC for up/downloading data transmission (programming & audit trail information). Interface: Infrared Light Beam Activation: Refer to Lock Instructions Distance: 1" to 4" above the infrared LED Controls: 3 (Power On/Off, printer Contrast and Paper Feed) Paper: Uses common thermal paper available at most office supply stores (supplied)