Wirless headphone,transmeter distance can be 30 meters. it should be more convenience for your work.

Wireless Headphone

TRANSMITTERWorking Frequency: CH1:107.1MHzPower supply: DC 3VTransmitting Distance: 30 MeterOperatingCurrent: 30 mARECEIVER Working Frequency: CH1:107.1MHzDC3VOperatingCurrent: ≤20 mA

Wonderful Wireless Headphone 5E-WIR003