Additional Details ------------------------------ Product description: Manufacturer: Treasure Products Model: Vibra-Tector 740 Detection Type: Pulse Induction Search Mode: All metal Communication: Vibration and Light Tuning: Automatic Overall Length: 17 inches (43 cm) Coil Diameter: 4 inches (10 cm) Weight: 1 lb. (450 grams) Power Source: One standard 9 volt Wrist Strap: Included 9v Battery: Included Warranty Period: 1 year Origin: Made in the USA Material: Metal