NISUNS 16 LED High Intensity LED Law Enforcement Emergency Hazard Warning Strobe Lights 18 Modes for Interior Roof/Dash / Windshield with Suction Cups (White/Amber) Purchase comes with one strobe light unit and 3 suction cups and installation bracket Size:8" ( wide ) x 1.6" ( height ) x 5.1" ( depth ) Can be seen upto 1/4 mile Upto 50,000 hrs life expectancy while consuming less power then standard bulbs All vehicles equiped with a 12 volt cigarette adapter.