ALTAIR headsets can be ordered with standard size 4pin XLR connector (reference name starting with "AM-") or with miniature 4pin XLR (reference name starting with "WAM-"). WAM-100 & WAM-100/2 WAM-100 (dual earpad) and WAM-100/2 (single earpad) are ALTAIR´s most used wireless intercom headsets. Reliable and long-lasting, these models perform great in a wide variety of situations. All spare parts are available for proper maintenance. WAM-100/S & WAM-100/2S Both "S" models implement interesting advantages: better noise insulation and rotatable microphone boom. The microphone is switched ON/OFF when moving the microphone UP/DOWN. These models are strongly recommended for those professionals working in loud environments. All spare parts can be ordered for proper maintenance.