This four-channel controller allows you to connect and control output to four individual heater strips (not included). Most heater straps from all the major manufacturers are supported via standard RCA phono type sockets. 

Each output can be set independently to the required output level.

A separate cigarette-lighter type plug with a 10 amp fuse and 2m of cable is included.  The SF-DC4a can be powered from a separate 12V power source of your choosing.