Specification: The third generation FS2011 Size: 99 x69x24mm The weight is 110 grams. Detection ray types: Y, X and hard B ray Detector: Energy compensated GM tube (Geiger counter tube) Dose equivalent rate: 0.00~1000Sv/h(10mSv/h). Accumulated dose equivalent: 0.00Sv~500.0mSv. Energy range: 48keV- 1.5mev< Soil (30% of cs - 137). Language: Chinese + English, arbitrary switching. Relative inherent error :< Soil 5% cs 1 MSV/h (137) Sensitivity: 80CPM/uSv/h(for CO-60) Dose rate unit: Sv/h, uGy/h, mR/h, CPS CPM optional switch. Power supply :2 no. 7 (AAA) batteries (not include) The battery lasts about 26-30 days in 24 hours. There are 8 alarm thresholds for current dose rate and cumulative dose value Alarm mode: sound, vibration and light Freebies: bags, clips Friendly Tips: Photo color might be a little different from the actual product due to color display of different monitors. Packing Included: 1 x Nuclear Radiation Detector