Oklahoma Sound® Wireless Headset Microphone, 200 ft Range, Ships in 1-3 Business Days (NPSLWM7) EachOklahoma Sound Wireless Headset Microphone Oklahoma Sound's Wireless Headset Mic is designed for use with OS lecterns. The wireless configuration allows for a 200 ft range to roam. Great for schools, meeting rooms and auditoriums. Global Product Type: Headset Microphones Maximum Wireless Range: 200 ft Mounting Details: Headset Power Source(s): Battery Batteries Included: No For Use With: Oklahoma Sound Lecterns Product Biodegradability Indicator: N