Heavy Duty Noise Cancelling Boom Microphone Headset with PTT on Earcup - (requires separate adapter cable) - Noise Reduction Rating = 24dB (EX500 & EX600?XLS: requires RKN4093) (PR1500: requires BDN6673 - Intrinsically Safe (FM))

Compatible with: 

Motorola often changes the product SKU name. This product may have also been known as BDN6645a, BDN6645b, BDN6645c, BDN6645d, BDN6645e, BDN6645f, BDN6645ar.