AA Battery Billet Aluminum STROBESTIK Emergency Red LED Personal Strobe Light Uses single AA battery - Any type: Alakaline, Carbon, Lithium, Rechargeable Red LED, 5-Mode Operation, Omnidrectional 360-deg Lens Runs up to 48 hours continuous strobing Designed in USA. Trusted since 1962. Made with military grade 6061 aluminum / polycarbonate