this already has a adaptor which is used to get connected to the Avaya Phone.
with manual
Noise Reduction
Binaural, Sound Tube, US
GN netcom Headset: PHP 1500.00
contact (0923) 668 2202 location: Basak Pardo Cebu City
"A friend told me nga this call center headset is being used here in the Philippines on call center companies and homebased call centers, might be that someone needs. Just contact the number above for the purchase".