Sound your best defy the elements. Shure DuraPlex microphones have been designed to perform to the highest standards in the harshest conditions. Whether its film theatre or fitness the DuraPlex DL4 lavalier will deliver fault-free audio and out-last the competition a hundred times over. Tested tested and tested again. DuraPlex microphones have been painstakingly developed to ensure an IP57 certification rating. This means the tiny condenser capsule will always sound crystal clear even when immersed in dust dirt sweat or water. Thanks to the reinforced spiral design the cable is immune from fatal connection issues that can occur after heavy use. No matter what the situation your words will never get lost again.