This billet aluminum timing tab has a built-in self-powered LED timing light or car battery hookup. Permanently mounted so there's no need for additional timing lights. The hands free design allows one person to set timing! U.S. Pat. No. 7,503,209.
Features:

• Fits 1963 to 2011 Small Block Ford Engines 289-302 Using a 11 O'clock Position TDC
• Made from High-Quality Billet Aluminum
• Black Anodized
• 3V Lithium Battery Included
• Sold Individually