DEI 998T Bitwriter Programming ToolThe remarkable, Innovations Award-winning Bitwriter is the preferred way to quickly and accurately program Directed Electronics ESP security and convenience systems, including most Directed Electronics remote start and keyless entry systems.Use with any ESP Series DEI alarms (Viper, Sidewinder, Python, Hornet, Automate and Valet ). Program all the features of your alarm thru this portable programmer. Long lasting rugged ABS casing. Alphanumeric LCD screen allows customer specific configuration. Directly plugs-in to DEIs pc series of products. No more siren chirps program. Learn routine features on the go. Includes 4-pin plug for the newer Clifford and Viper systems