1.It Makes It Easy To Locate And Track Buried And Hidden Wires And Other Hidden Lines.Applicable Only To Electrical Cables And Not To Sprinklers Or Irrigation Faucets2.It Is Easy To Find The Fence For Pets, Metal Wire, Metal Tubes, Electric Wires And So On. Determining A Hold On A Specific Drill Position Prior To Drilling3.Tracing Is Performed At A Depth Of 1,000 Feet.Source: 9V Alkaline Cell.4.Warning: Do Not Use The Circuit Of Load To Prevent Damage To The Tester! The Device Is Only Used To Locate Unpowered Wires.5.Warning: Only Applies To Single-Core Or Double-Core Wires, Not Wires Multi-Core And Beam. Not Including 9V Batteries. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!