Features Support Most Geiger Tubes: M4011 can be installed directly, other models can not be installed, but flying leads can also be used (digital multimeter measures the positive pole of Geiger tube to power supply negative, adjust blue potentiometer until multi Monitoring: External screen or pointer meter can be used as monitoring, the output signal is interrupt output, the waveform is the falling edge of the pulse, and the low level is valid Stable Structure: This geiger counter module has stable circuit structure, extremely low failure rate and easy to use Application: Can detect x ray, γ ray, β ray, and can perform radioactive dose detection on marble, antiques, jades, iodine 131, medical equipment and various unidentified minerals Basic Specifications: Starting voltage <350V, recommended working voltage is 380V, extreme working voltage is 550V Specification: Item Type: Geiger Counter Module Material: Resin Geiger Tube Model: M4011 Type C Interface Power Supply: 5V 1A Sound Light Alarm: Support Geiger Tube Parameters: Start Voltage: <350V Recommended Working Voltage: 380V Extreme Working Voltage: 550V Maximum Background Count Rate: 25 counts/min Life Time: >1 x 109 Pulses Detection: x β γ Rays Package List:1 x Geiger Counter Module1 x Geiger Tube Package List 1 x Geiger Counter Module 1 x Geiger Tube