Tripp Lite Datashield Serial In-Line Surge Protector, DB9, (DB9) PROTECT YOUR DB9 SERIAL EQUIPMENT: DB9 protects 9 pin serial connections for dataline surge suppression of data terminal, data communications equipment and PCs, printers, modems and more. COMPLETE SERIAL PORT DB9 SURGE PROTECTION: Offers protection on all 9 lines, plus D shell chassis. Convenient DB9 input and output connects directly to the protected port, obtaining a ground outlet from the computer chassis. REVERSIBLE MALE OR FEMALE DB9 PORTS: The unit is configurable for use with any 9-pin male or female captive serial port. COMPREHENSIVE PROTECTION: Protects against the effects of electrostatic discharge, faulty wiring and lightning LIFETIME LIMITED WARRANTY: This datashield serial in-line surge protector offers a Lifetime Limited Warranty.