Single antenna 4.6 MHz system operates on 120 VAC or 220-250 VAC. Detects 3-4 feet equally on both sides of the antenna. One antenna will cover up to a 6 foot door when placed in center, or 3 foot door when placed at one side. Two antennas will cover a 12 foot opening. Easy installation.
* Uses only hard tags (no labels) * 1.990 MHz and other frequencies available
