Features: Small size and lightweight, easy and convenient to carry around. Large screen display makes it easier to read data, and the buttons are easy to operate. With mute and alarm mode, test and pause mode, and the backlight can be turned on or off. It can meet the needs of home life detection, substation detection, mobile signal tower detection, etc. The housing is made of fine quality ABS, which has fine heat resistance and cold resistance, high strength and fine toughness. Specifications: Material: ABS, Metal Size: Approx. 10.3x2.7x7 for cm/4.06x1.06x2.76 in Screen size: 57x43mm/2.2x1.7 in Test range: Power density: 0-99.999μw/c㎡ Electric field intensity: 0-999.99v/for m Magnetic field intensity: 0-99.999μT Test accuracy: Power density: 0.001μw/c㎡ Electric field intensity: 0.01v/for m Magnetic field intensity: 0.001μT Frequency range: Power density: 50MHz-5GHz Electric field intensity: 20Hz-100MHz Magnetic field intensity: 20Hz-1MHz Package Includes: 1x Radiation Detector note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3x AA batteries OR 3x 1.2V rechargeable batteries are needed.(Not included)