AKG WMS 470 Vocal Set D5 handheld wireless microphone system has an automatic frequency setup function that immediately finds and displays all available channels. AKG WMS470 Vocal Set D5 consists of a HT 470 handheld transmitter with D 5 mic element and a SR 470 receiver. WMS 470 operates up to 16 channels simultaneously within the same frequency band and up to 48 channels by using multiple frequency bands. AKG Vocal Set D5 handheld transmitter is powered using a single rechargeable battery, providing up to 14 hours. HT 470 is a rugged tool built to take even very rough handling. AKG SR470 receiver displays backlighting that changes in color to warn the user of such critical operating conditions such as transmitter battery running low, audio peaks, or low RF signal strength. AKG WMS 470 Vocal Set wireless mic system has crisp and professional sound of the D5 dynamic microphone within its capsule.