Feature:1. USB RECHARGEABLE: Electromagnetic field radiation detector support USB charging for longer usage time. come with small size, easy to carry2. MULTI METHOD ALARMS: Radiation assessment, sound and light alarms when radiation exceeds the standard, stable and reliable3. 3 MEASUREMENTS AT SAME TIME: Three measurements of electric field, magnetic field and radio frequency, and display at the same time4. STABLE AND EASY TO OPERATE: Adopt excellent software algorithm, bring stable reading. Come with color display, easy to operate5. MEASURE HIGH AND LOW FREQUENCY: Imported high speed operational amplifier, simultaneous measurement of high and low frequency electric and magnetic fieldsSpecification:Item Type: Electromagnetic Field Radiation Detector Material: ABSSpecificationElectric FieldMagnetic FieldHigh Frequency or Power DensityRange0-2000V/m0-100uT0-1000uw/cm2Resolution0.01V/m0.01uT0.01uw/cm2Exceeded yellow alarm40V/m0.4uT40uw/cm2Exceeded red alarm400V/m20uT200uw/cm2Frequency measurement range6HZ-5GHZBatteryBuilt in 3.7v 400mAh polymer lithium batteryChargeCharging Voltage: 5V; Charging Current: Greater than or equal to 1AGreen Light On: Charging; Green Light Turns Off: Fully chargedDisplay1.8in color TFT display, 4 level brightness adjustment.Package List:1 x Host1 x USB Cable1 x User ManualNote:Do not randomly knock to cause irreversible damage.