Comtek Wireless Headphone System (1 TRANSMITTER 5 RECIEVERS, 5 HEADPHONS):

The PR-216 is a high fidelity, professional quality, personal monitor receiver designed to work with the M-216, M-216 Option P7, BST-25/216, and BST 75-216 series transmitters. This versatile receiver tunes COMTEK's high fidelity companded channels for program monitoring applications as well as standard non-companded, narrow-band channels for speciality applications such as time code links. It is digitally synthesized and frequency agile for easy multi-channel operation.
The M-216 Option P7 is the perfect on-the-go field transmitter offering directors, crew, and client reliable and superior sounding wireless program monitoring. For use with the PR-216 or PR-216 Option 7 wireless receivers, this portable, battery powered transmitter is built to withstand the most demanding needs of location sound monitoring.
Equipped with a flexible short whip antenna, the M-216 Option P7 offers superior RF transmission and a greater operating range. Digitally synthesized, this multi-channel transmitter tunes 57 channels in the 216-217 MHz band and offers 5-channel compatibility for multi transmitter simultaneous operation. It has an adjustable gain control and a single LED VU meter that offers a quick reference visual indication of the input level setting.
The black version of the Sony MDR-ZX110 Stereo Headphones utilize 30mm dynamic dome drivers with PET diaphragms in a closed-back supra-aural "on-ear" design to deliver an extended low frequency response of 12 to 22,000 Hz with a sensitivity of 98 dB/mW into a 24 ohm load.
For improved portability, the earcups can swivel flat and fold up into a more compact form factor. A flat Y-type cable design helps prevent tangles and terminates in an L-shaped stereo mini plug.