DESC: Provides freedom of movement for video production, computer applications and business presentations. Two switchable frequencies for interference-free operation High-band VHF operation for superior sound, Normal operating range 100'; up to 300' under optimum conditions, Durable, flexible antenna can be positioned for best reception, Real-time monitoring capability with included earphone, Rugged design and construction with handsome non-reflective finish, Quick and reliable mounting system for camcorder use Receiver and transmitter are each powered by a single 9V battery.