AKG WMS 40 Mini Vocal Set delivers HDAP (High Definition Audio Performance) technology that ensures the best possible, most realistic sound at any time. AKG WMS 40 Mini Vocal Set includes an HT 40 Mini handheld transmitter and a SR 40 Mini receiver. AKG rugged HT 40 Mini handheld transmitter features an ON/OFF/MUTE switch and a sturdy wire-mesh cap protecting the cardioid dynamic microphone element. HT 40 mic has a battery life of up to 30 hours off a single AA battery reducing the need to replace batteries and thus saving money. AKG SR 40 Mini receiver provides three status LEDs indicating ON/OFF status, received signal strength (RF OK), and audio clipping (AF CLIP). AKG WMS Mini Vocal Set is a compact handheld wireless microphone system that is packed with quality and reliability.