Benefits One Button 360 Degrees Pinpoint Water & Dust Resistant Humanised Design Usage Method 1. Install a 9V battery or a 9V rechargeable lithium battery for using.When the indicator light keeps flashing, it means the battery is low, you need to replace the battery, if it is a lithium battery, you have to charge it.2. Press the power switch means turn on, press it again means turn off.(The LED lighting turn on /off follow this operation.)3. After the power is turned on, the indicator light is on. Please make sure the detector is no metal within 0.5 meters,after 2-3 seconds of power on, the detector metal can be searched.4. If no metal is found but an alarm sounds, this is caused by external interference and can be used normally by rebooting. Package Included 1 x Hand Held Metal Detector(Need a 9V Battery,Not Includes) 1 x Holster1 x Retractable hanging wire1 x User Manual