inductive guard patrol system

Specification:
1) Waterproof and Shake-resistant, Aeronautical Aluminum Alloy material, resist low temperature,durable and sturdy
2) No button,no need press button and automatically read(no problem of button)
3) Type of Card: EM card
4) Flash memory security, the data is safe and reliable. It is of large capacity which can store up to records. Moreover, it can prevent data loss or intended modification.
5) Sound, light and buzzer indication when reading successfully
6) use USB module to download data, high speed for downloading,
7) Li battery, Low power consumption and long battery life
   2800mA,can read more than 200000pcs records when battery charge enough