There are fourpieces of advice:
1. To betargeted. If you want to detect gold, buy this instrument in Junhong Technology&ElectronicCo., Ltd. to buy a large company that you can choose a more sensitive to detectgold, like GF2, FS2.
2. Choose thecorrect sales merchant. , firstly, it can guarantee the quality; secondly, it havea better after-sales service.
3. There is alot of change in the requirements here. The best one is fit for their own. Thedetecting depth depends on the size of the object. You must be clear about Theprinciple of choosing products. You have to do a simple judgment about yourwanted depth.
4. The priceshould be reasonable.