Features Monitoring: the external screen or pointer can be used as monitoring, the output signal is an interrupt output, the waveform is the falling edge of the pulse, and the low level is valid. Application: Can detect X-rays, γ rays, β rays and can perform radioactive dose detection on marble, antiques, jades, iodine 131, medical equipment and various unidentified minerals. Support Most Geiger Tube:M4011 can be installed directly, other models cannot be installed, but flying cables can also be used (digital multimeter measures the positive pole of Geiger tube to power the negative, adjust the blue potentiometer until the multimeter shows DC170V). Stable Structure This Geiger meter module has a stable circuit structure, extremely low failure rate and easy to use. BASIC SPECIFICATIONS Starting voltage 350V, recommended working voltage is 380V, extreme working voltage is 550V. Specification: Item Type: Geiger Meter Module Material: Resin. Geiger Tube Model: M4011 Type C interface power supply: 5V 1A Sound light alarm: assistance Geiger tube parameters: Starting voltage: <350V Recommended operating voltage: 380V Extreme Operating Voltage: 550V Maximum background counting rate: 25counts/min Service life: >1 x 109pulses. Detection: x β γ rays Package list: 1 x Geiger Meter Module 1 x Geiger tube Package List 1 x Geiger Counter Module 1 x Geiger Tube