DIRECTED ELECTRONICS The BITWRITTER for use with any ESP series DEI alarms (Viper, Sidewinder, Python, Hornet, Automate and Valet ). Program all the features of your alarmthru this portable programmer.The BITWRITTER for 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.