Guard Reader is anti-vandal, anti-spamming, very easy to handle and low or negligible maintenance cost.it recognizes approved proximity tags automatically without any delay. The Guard Reader is waterproof and having IP67 certified. Guard Reader requires low power consumption of the electronic Circuit. It requires 3 AAA commercial alkaline or ER 18505 batteries to power up. Guard Reader has an extremely high memory capacity and can be used for long periods in the field without the need for intermediate readouts.