its directly connected to ur car battery..and the whole setup comes with a switch using which u can change the pattern by holding down the switch 4 2 secs 4 the next flash pattern and about 5 secss fro the last flash pattern...so u can keep these strobes on without even using ur key..but a sincere advice,4get tryin to make it look as if ur takin a snap of the guy opposite to u these lights r so bright u could possibly even blind a person totally for atleast 10-15 secs..they r tht bright..so think once as to where u want to put them,best bet wud be under the car..u do get smaller ones but their effect sucks.. |