Pro Detector TX-1001 Security Hand-Held Metal Detector Streamlined, elegant appearance, super sensitivity,Adjustable sensitivity, easy use Detect all kinds of metal: ferrous and non-ferrous metal 2 kinds of alarm method: buzzer & LED alarm; vibration & LED alarm Low battery indicator/ Charge Lamp give you a timely alert After installing 9V chargeable battery in the battery compartment, you can charge the device directly.