DR & LE labels are compatible with all brands of Acousto-Magnetic systems, such as Sensormatic, WG, Gateway, etc..

LE means Low Energy. It is designed for relatively narrower aisle width protection when DR labels were just released (for generating extra high profit from new products). Along with the decline of the prices of the labels, the price of LE labels is more and more close to DR labels, thus LE labels are less and less used.

DR means Dual Resonance. It is the most popular AM labels today. Unlike LE label, which has only one piece of amorphous ribbon, DR label has two pieces of amorphous ribbons which helps in generating more stronger signal.