Before using, please read the following terms carefully: 1. Make sure that the tip of the needle is upright and no objects touch.the button of the power supply have a line ,it's the ground wire . Please do not connect with the ground wire to the plate ,it's too close will be arcing leading to burn, please kindly know it .2. Do not touch the tip of the needle with any objects,when it's work.3. In order to prolong the service life of the product, use it with a fan, and the continuous working time should not exceed 1 hour. It is recommended to use it intermittently, that is, work for 1 hour and rest for 5-10 minutes.4. Use environment: temperature should not exceed 30, humidity should not exceed 80%Power: Less than 10-15WInput voltage: AC220V-50HZ/60HZ,Output voltage: DC-15KV0.5KVNegative ion concentration: 200 million/cmPlug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so onThe actual product may have slight color difference or difference, which will not affect the useVoltage: AC 220VColour:WhiteMaterial:Plastic + MetalPackage Contents:1 x Negative IonizerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.