Feature: This product is made of high quality materials and is durable and has a long service life. With a large LCD data display, the readings are clear and accurate, suitable for a variety of environments. The anti-slip design of the body makes the grip comfortable and easy to use. This product can be used for both electric and magnetic field measurements, beautiful and practical. With sound and light alarm, when the test result exceeds the safe value, the instrument will automatically alarm. The design is fashionable, easy to operate, easy to carry, and convenient for on-site measurement. Data lock is supported, and the radiation value is locked with one key. Specifications: Condition: 100% Brand New Material: Plastic Measuring range: 1V/m-1999V/m Measurement object: electric field Measurement accuracy: 1V/m, 0.01ut Resolution: 0.4 seconds Size: Approx.130*60*25mm / 5.1*2.4*1.0in Weight: Approx.146g / 5.1oz Package list: 1 * Radiation Detector (Battery not included) 1 * Instruction Manual .