usb hardware and software for logitech 600,800

Similar to

with this windows7 tool to allow usb to recognize headset

I have logitech 600 (2 quantity), 800 and I think I will get the identical usb sticks confused

can I just link them together using software tool

Is the hardware identical ?
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There are no such models ever made by logitech. Are you talking about H??? (duplex headeset) ?
gheist I think he is illustrating the two
logitech 600
and the Logitech ,800

Wireless Headset H600
Re-pairing the H600 headset with the wireless receiver
How to
You may need to re-pair your headset with its wireless receiver or pair it with a replacement receiver. Here's how:
Initiate the pairing mode for your headset
Download and run the pairing utility.
NOTE: You can get the pairing utility from the Wireless Headset H600 Downloads Page.
Slide the switch on your headset to the "on" position.
Press and hold the Volume up and Mute buttons together until the link LED indicator blinks rapidly.
Initiate the pairing mode for your wireless receiver
Make sure your wireless receiver is connected to a USB port on your computer.
When the headset is in pairing mode, click Next on the Pairing Utility page to initiate the pairing mode on the receiver.
Re-pairing the H800 headset with the wireless receiver
Download the software
It auto detects your windows OS x 32 or x 64
I'm running x 32 bit W7 so it shows x 32 in the URL
rgb192 if you able to pair two headphones of different makes  to one unifying receiver and they are picked up on one receiver it should identify them both as 1.
both headphones paired into 1 receiver both identical, but will be treated as a single device.
I don't believe you can do this with different models.

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You need logitech unifying receiver to link multiple devices. Ones boxed are not unifying and handle device at a time.
rgb192Author Commented:
Thanks for pairing advice.
If you get multiple devices in a box (like keyboard and mouse) you get unifying receiver.
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Wireless Hardware

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