Aervoe 1142 Emergency Road LED Triangle Reflector (3-Pack), Orange, 18 x 7 x 2-Inch 18" tall with 21 highly visible LEDs; 3-pack set Reflective tape on all sides Requires 4-AA batteries (included) or the included 12V DC power cord Durable nylon storage case; Safety Specification FMVSS 125 Warning Device The 21 LED's will hold a steady-on or flash; Visible up to 2/3-mile 3280 feet