1. Can be extended to operate continuously for a long time;

2. Can be operated indoors and outdoors;

3. Automatically switch to low power mode when not checking;

4. Contains long-life rechargeable batteries (fast and highly reliable rechargeable batteries, wireless charging);

5. Working temperature: -40 ℃ ~ 70 ℃; storage temperature: -40 ℃ ~ 80 ℃; relative humidity 0 ~ 98%; 6. detection distance: pin 30-60mm; six or four type pistol: 180 ~ 195mm; six inches Dagger: 160 ~ 180mm; diameter 20mm steel 120mm;