The waterproof digital thermometer is NSF certified and has automatic shut-off. Designed with anti-microbial additive to avoid bacteria growth and reduced stainless steel tip for a quick response time. - Plastic/Stainless Steel - Temperature Range -40F to 392F - NSF - Power Source 1.5v #LR44 Battery - Length 6 in - Width 3/4 in - Thickness 5/8 in - Sold per each ***CALIFORNIA PROP 65 WARNING: This product contains a chemical known to the State of California to cause cancer, birth defects or other reproductive harm.***