Eighteen (18) over-lapping detection zones with multiple alarms. Sensitivity for each zone is adjustable in increments 0-255. 5.7 inch (14.5 cm) LCD screen. Infrared remote control. Sound & LED alarms located on both sides clearly indicate precisely where metal is detected. Automatically counts people and alarms. Secure operation. Only authorized personnel can access the control panel. Easy assembly: Ships with only 2 pieces, cables and 8 screws. Simple to follow instructions.