screen display makes it easier to read data, and the buttons are easy to operate.The housing is made of fine quality ABS, which has fine heat resistance and cold resistance, high strength and fine toughness.It can meet the needs of detection, substation detection, mobile signal tower detection, etc., and it is easy and convenient to carry around.With mute and alarm mode, test and pause mode, and the backlight can be turned on or off.Test range: density: 0-99.999w/cElectric field intensity: 0-999.99v/mMagnetic field intensity: 0-99.999TTest accuracy: density: 0.001w/cElectric field intensity: 0.01v/mMagnetic field intensity: 0.001TFrequency range: density: 50MHz-5GHzElectric field intensity: 20Hz-100MHzMagnetic field intensity: 20Hz-1MHzBattery: 3 * AA 1.5V battery or 3 * 1.2V rechargeable battery (not included)Charging: USB 5V 2A inputCharging time: greater than or equal to 4 hourssize: 105 x 70 x 30mmMaterial: plasticcolour: blackPackage Contents:1 x Electromagnetic Radiation DetectorOnly 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.