The WH-8000 16-Channel UHF Wireless Handheld Microphone from Anchor Audio is for use with 8000 Series and F1+ Series audio systems. The sleek and lightweight design offers a 150' range with 16 user-selectable wireless channels. The WH-8000 is powered by two AA batteries, which will operate approximately 6 to 8 hours with fresh batteries. The Anchor WH-8000 operates on the 540 to 570 MHz frequency range.