The AKG Perception Wireless Vocal Set is intended as an affordable wireless handheld microphone package well suited for DJs, presenters, singers, and more. The system includes the SR 45 wireless receiver and HT 45 handheld microphone. The HT 45 is lightweight and features a 3-way On/Off/Mute switch. Simply power the microphone transmitter and receiver, choose between one of the 8 available UHF frequencies, and you're ready for wireless vocals. The compact HT 45 is powered with a single AA battery for up to 10 hours.