Waypoint Counter Surveillance has added the DT-820 Plus to our line of non linear junction detectors. The DT-820 Plus is a portable hand-held NLJD operating at 2.4GHz and is an upgraded version of the DT-820, with a higher level chip set, improved sensitivity, and an extendable pole which increases the NLJD’s reach from 80cm to 136cm. The DT-820 PLUS provides visual, sound and vibration alerts upon detection.