Set to measure radiation value within a specific time, the data is clear (Can record multiple sets of data) Alarm value can be set and more secure Set alarm limits according to the environment, and alarm be triggered if the limit is exceeded!Support sound and light alarm modes Automatic sleep mode to extend battery life The can be set according to the needs. If there is no operation within the set time, it enter sleep mode to extend the battery life As small as a lipstick, you can put it in your bag, pocket or belt when you go out to protect your safety at all times Detection radiation types:Ionizing radiation (radiation, x-rays, etc.) Detector:Energy compensation tube (Geiger counter) Dose current rate:0.00-10000μSv/h(10mSv/h) Cumulative dose equivalent:0.00µSv-500.0mSv Energy range:48keV-15Mev less than equal ±30%(for 137Cs-) Sensitivity:80CPM/µSv (for Co-60) Dosage unit:µSv/h,µGy/h,mR/h,,CPM Alarm mode:lights, sounds (The product printed words depending on the batch, but this does not affect use) Color:As Shown Material:ABS Package Contents: 1 * Handheld Environmental Monitor kit 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.