Feature:1. Portable Lanyard: Anti fall design, anti loss, anti fall intimate design, convenient outdoor use, you can easily take it out for outdoor use.2. Alarm Value Can Be Set: Support sound, flash, vibration three alarm modes, you can set the alarm value according to your own needs.3. Nuclear Radiation Detector: Real time monitoring of X rays, Gamma rays, hard beta rays, to meet your monitoring needs.4. Multifunctional Page: Real time monitoring of instantaneous dose rate, cumulative dose, average dose rate, easy observation in different light environments.5. Large Capacity Battery: 400mAh battery, the battery life is about 10 hours in the bright screen state, and the standby state can be about 24 hours.Specification:Item Type: Digital Nuclear Radiation DetectorWeight: 112g/3.95ozMaterial: ABSDetection Count: 48mm Geiger counterMeasuring Range: 00.08Sv/h~9999Sv/hWorking Environment: -10~50CHumidity: 95%RH No condensationBattery Capacity: Polymer lithium battery 400mah (inclusive)Battery Life: 15~24 hours, charging time :1 hourCharging Mode: USB type cProduct Size: 10.5 x 3 x 1.5cm/4.13 x 1.18 x 0.59in.Package List:1 x Detector1 x Instructions 1 x USB Cable