Sennheiser headphones with charging cradle .. $111 on sale on Amazon ... $50.00 through Used Cowichan and e-transfer. Pick up in Duncan (near Queen of Angels school). Range of up to 100 metres (300 feet) Receives Reception Through Walls, Ceilings & Outdoors Frequency Response: 22 - 19500 Hz. The SPL for peak deviation is 106 dB and the impedance is 24 ohm Transmitter doubles as a charging unit - headphones are recharged when stored on the metal cradle.THD, total harmonic distortion: < 0.7 % 926MHz Radio Frequency (FR) wireless headphone system - Not Bluetooth. Operating time 20 h