Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Features: 1. Fast And Sensitive Electromagnetic Radiation Detector 2. Dual- Machine, Measuring Electric And Magnetic Fields At The Same Time 3. Fast And Sensitive, Wide Range Detection, Flashing Light Alarm, Low Battery Reminder, Radiation Trend 4. Led Light Prompts, The Radiation Value Is Clear At A Glance 5. Risk Index Is Determined By Different Colors Description: Detector Risk Index: First - Green Light: Range Between 0 And 1.5mg (Normal); Second - Green Light, Detects Low-Level Emf, With A Range Between 1.5 And 2.5mg (Low Risk) ; The Third - Yellow Light, Detects Medium Levels Of Emf In The Range Of 2.5 To 10mg (Medium Risk); The Fourth - Orange Light, Detects High Levels Of Electromagnetic Fields In The Range Of 10 To 20mg (High Risk); Fifth - Red Light, Very High Emf Range Of 20+Mg Detected (Ultra High Risk) TIP: Depending on the batch, the appearance, color, and printing of the product , which does not affect use. size: About 143 x 53 x 29mm Material: ABS colour: black Package Contents: 1 x Radiation Detector Only 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.