This 21″ mini-lightbar is ideal for fire apparatus, ambulances, and volunteer firefighters when the attention-getting power of strobes is desired. All Mini-JetStrobe models use quad-flash power supplies that minimize dark time. The custom designed optics distribute warning light more evenly to critical angles. ApprovalsAll Mini-JetStrobe models meet the SAE J845 and CAC Title 13, Article 22 specifications. MiniJetStrobe SJL2110PM is a 21″ mini-lightbar with (4) strobe heads, magnetic mount, and cigarette plug.