Features: 100% brand new and high quality. Made of premium strong plastic shell, impact resistant and durable. Can test the electric field and the magnetic field radiation at the same time. Display the radiation value on the LCD digital display, easy to read. Data locking, one-key lock of the radiation value and easily read the value. Sound-light alarm, when the test result exceeds the safe value, will alarm automatically. Radiation assessment, remind you whether the radiation value is safe or not. Specifications: Material: ABS Color: Black+Red Size: 130*60*25mm Power Supply: 3.7V lithiun battery(Included) Range: Electric: 1-1999V/m; Magnetic: 0.01-19.99T Accuracy: Electric: 1V/m; Magnetic: 0.01T Alarm Threshold: Electric: 40V/m; Magnetic: 0.4T Display: 3-1/2 LCD Display Test Bandwidth: 5Hz-3500MHz Sampling Time: Approx. 0.4 Seconds Test Mode: Bimodule Synchronous Test PACAKGE INCLUDED: 1 * Electromagnetic Radiation Detector 1 * User Manual NOTE: 1. Due to the hand measurement, there may have error measurement about 1-5mm. 2.Item color displayed in pictures may be showing slightly different on your computer monitor since monitors are not calibrated same. Your understanding will be highly appreciated.