The Whelen 295 Siren & Light Controller is a versatile and high-performance control solution for emergency vehicles, meeting SAE J1849 and California Title XIII requirements when paired with a 100-watt Whelen speaker. It combines hands-free operation, 18 customizable Scan-Lock™ siren tones, and dual 100-watt speaker support to deliver effective, reliable warnings in critical situations. Featuring a programmable slide switch, six customizable switches, and PA volume control with push-to-talk (PTT) override, it enables precise, adaptable control. Additional safety features include SI TEST® for system diagnostics, "Siren in Use" and "Siren Disable" indicators, and over/under voltage protection, with added input polarity and short-circuit safeguards. The controller offers LED backlit buttons for night visibility, a quick-copy function to replicate settings without a computer, and a bail-strap mount for easy installation.