Feature 1High Sensitivity: GM counter is compensated to improve energy response and detection sensitivity, especially suitable for environmental radioactive monitoring and detection of trace nuclear radiation. 2Probe Type: This geiger counter adopts probe type built in type, which effectively preserves the probe from damage and has a long service life. 3Fast Positioning: Retain the counting sound, quickly judge the radiation status of the surrounding environment, and quickly locate the accurate position of the radiation source. 4Simple Operation: One button can realize the conversion of multiple working modes, the handheld instrument is designed with built in high performance battery, which is suitable for outdoor portability. 5Widely Used: It can be used for the detection of radioactivity in household environment, daily necessities, mineral rocks, decoration stones, etc., and also for the detection of radioactive leakage of industrial or medical imaging equipment.Item Type: Geiger CounterMaterial: ABSGross Weight: 600g / 21.2ozProduct Size: Approx.13.5 x 8 x 2.5cm / 5.3 x 3.1 x 1.0inUse: portable, industrial, household, high radiation research, medical, X detection gamma beta radialBattery: lithium battery 14500 1300mAh (two batteries are required) (shipped with matching batteries)Plug: USB cableDetection Tube Size: Approx.29cm / 11.4in(excluding wires)Input: DC 5V 0.5AOperating Temperature: - 5C~40CWorking Voltage: 3.7V . Package List1 x Detector1 x USB Cable1 x Instruction Manual1 x Detector Tube2 x Battery