Features Recognition Ability: This proximity metal detector can single distinguish gold, silver, copper, iron, etc., and the alarm sound of gold, silver, copper, iron can be completely distinguished. High Sensitivity: This proximity metal detector improves the detection sensitivity and also increases the detection depth of the machine. Reception And Rejection: This proximity metal detector can detect a single selection through the identification button, for example: select gold, the instrument only alarm for gold. Multiple Function Operation Buttons: This proximity metal detector has multiple function operation buttons with one key positioning, sensitivity, discrimination and volume adjustment, etc. Ergonomic Hand Rest: This proximity metal detector has an ergonomic hand rest, even if a long time detection will not make you feel hand tired, and there is a non slip convenient arm nylon strap design, very practical. Specification: Item Type: Proximity Metal Detector Material: ABS Battery: 9V 6F22 Battery x 2 ( Without Battery ) Operating Frequency: 5.69KHz Package List:1 x Detector1 x Receiver3 x Bracket2 x Screw1 x Manual Package List 1 x Detector 1 x Receiver 3 x Bracket 2 x Screw 1 x Manual