The HA-W600RF lets you enjoy great sound anywhere in your home. This wireless 900MHz headphone with a 164 foot range (approximate) can be used with virtually any audio/video equipment. The JVC original Paging/Call Function allows for convenient voice communication from the base station to the headset user. Large 40mm diaphragms insure high quality sound. A self-adjusting, comfort fit head band makes them easy to wear. This wireless headphone features automatic on/off as well as automatic charging when returned to the base, and also it comes with auto tuning feature. Rechargeable Ni-Cad batteries are included.