Features Supports most Geiger tubes: M4011 can be installed directly, other models cannot be installed, but flying cables can also be used (digital multimeter measures the positive pole of the Geiger tube to power the negative, adjust the blue potentiometer up to multi Monitoring: the external screen or pointer meter can be used as monitoring, the output signal is a break output, the waveform is the pulse drop front, and the low level is valid Stable structure: this geiger counter module has a stable circuit structure, extremely low failure rate and easy to use Application: it can detect X-rays, γ rays, β rays, and can perform radioactive dose detection on marble, antiques, jade, iodine 131, medical equipment and various unidentified minerals Basic specifications: starting voltage Specification: Item Type: Geiger Counter Module Material: Resin Geiger Tube Model: M4011 Type-C interface power supply: 5V 1A Sound Alarm: Support Geiger Hose Parameters: Initial Voltage: <350V Recommended working voltage: 380V Extreme working voltage: 550V Maximum background counting frequency: 25 counts/min Duration: >1 x 109 pulses Detection: x β γ Rays Package List: 1 Geiger Counter Module 1 Geiger Tube Package List 1 x Geiger Counter Module 1 x Geiger Tube