extend The Connection Between Your Db9 Serial Devices By Up To 1m. The Mxt1001mbk Black Serial Extension Cable (1m) Features One Db9 Male Connector And One Db9 Female Connector, Providing A High Quality Extension For Your Rs232 Serial Devices, Which Enables You To Position Your Peripheral Devices As Needed. Expertly Designed And Constructed Of Top Quality Materials To Ensure Durability, This Db9 Extension Cable Is Backed By Our Lifetime Warranty.