The thomson whp3311 headphones create convenience comfort and style they transmit wirelessly crystal clear sound from an audio source direct to the headset therefore eliminating the constrictions of a wire with an impressive range of 100m outdoors and 20 30 m indoors at a frequency of 863mhz you can wander around the home or garden carry out chores errands or work and remain in awe at the amazing capabilities of the whp3311 as they deliver enhanced audio through walls and floors the clar