This patrol point is non-contact. The high-sensitivity card can still be used normally under harsh conditions such as rain, snow, ice and dust. While ensuring the card reading distance, it reduces the power consumption of the patrol machine passive card, and the service life is more than 20 years. It has waterproof, shockproof and anti-magnetic functions. It can be installed anywhere without wiring and environmental impact. The patrol point is a passive memory, with a built-in patrol point, no power supply, and easy to install. 1. Operating frequency: 125kHz EM-ID 2. Shell structure: engineering plastic shell, beautiful and exquisite, super fall-resistant and wear-resistant 3. Color: white, green 4. Features: The surface is made of light storage luminous material, which can automatically glow in the dark and can be recycled infinitely (white) 5. Size: φ60mm 6. Ambient temperature: -40°C~85°C 7. Service life: 20 years 8. Weight: 30g 9. Number of card readings: >350,000