Feature: 1. High Sensitivity: GM counter is compensated to improve energy response and detection sensitivity, especially suitable for environmental radioactive monitoring and detection of trace nuclear radiation. 2. Probe Type: This geiger counter adopts probe type built in type, which effectively preserves the probe from damage and has a long service life. 3. Fast Positioning: Retain the counting sound, quickly judge the radiation status of the surrounding environment, and quickly locate the accurate position of the radiation source. 4. Simple 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. 5. Widely 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. Specification: Item Type: Geiger Counter Material: ABS Gross Weight: 600g / 21.2oz Product Size: Approx.13.5 x 8 x 2.5cm / 5.3 x 3.1 x 1.0in Use: portable, industrial, household, high radiation research, medical, X detection gamma beta radial Battery: lithium battery 14500 1300mAh (two batteries are required) (shipped with matching batteries) Plug: USB cable Detection Tube Size: Approx.29cm / 11.4in(excluding wires) Input: DC 5V 0.5A Operating Temperature: - 5°C~40°C Working Voltage: 3.7V. Package List: 1 x Detector1 x USB Cable 1 x Instruction Manual1 x Detector Tube2 x Battery