Two Alarm Ways: This nuclear radiation detector has sound and light indication function, the results will alert you in time. Multifunction Tool: It has the functions of real-time dose rate, average dose rate, cumulative dose rate, trend chart, etc. OLED Display Screen: A small OLED screen is adopted to clearly display the measurement results, you can see the data more clearly. ARM processor is adopted, which has quick operation speed and powerful processing function. Wide Applications: This nuclear radiation detector can detect X-rays, Rays, X-ray can detect the radioactive dose of marble, jade, sea products, iodine 131, various unknown minerals for decoration. Geiger tube:j321 (compatible with M4011) Screen resolution:128 x 64 MCU:ARM Display accuracy:0.001usv/h Detection display ranges:0-9999usv / h Power supplys:USB, 5V, equal 500mA Note: Test the cover tube close to the radiation target. Do not touching the component area during power on to avert electric shock. Please put your hand in the handheld area. Colour:As Shown Material:ABS Size:About 116x85mm Package Contents: 1 * Nuclear Radiation Tester 1 * USB Cable Only 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.