The Cons:
Entire set seems made of plastic and has a very non-sturdy "feel".
49.87Mhz operation. This is bound to pick up interference and hurt the range.
Requires one 9-VDC for transmitter and two AAA's for headset.
No AC "Wall Wart" provided. (9-vdc 200Ma neg sleeve hot tip.)
The Pros:
THEY ARE CHEAP!
THEY WORK!
AC power pin provided if you have an AC power supply.
Comments:
Okay, It is weird that Sentry didn't include a 9-vdc AC adapter. But the 200MA supply is cheap and easy to find. I had a couple laying around. I had a charger I used for AA Camera batteries so I bought a package of 4 rechargeable batteries when I bought the Headphones. Power supply solved!
I bought these to monitor source and recordings from Guitar that is routed through a USB Audio Interface on my computer. I sit maybe 6' from the transmitter. I have NO PROBLEMS with "range
I have this setup in my basement in between two computers (one laptop and one desktop). My network is cabled Ethernet (no wireless equipment at all). In addition to the two computers, I have three guitar amps, mixing board and a bunch of other electrical crap plugged in and usually "on". So Interference is not a huge issue in my setup...especially when sitting close to the transmitter.
Just out of curiosity, I fired up some Joe Walsh and took the headphones upstairs to the main level (out of the basement). There were spots where interference was definitely a problem. May not have been as bad had I had the transmitter located in a more reasonable place...like hooked up to a TV or Audio Video installation or something else that normal usage would suggest. At any rate, moving a few feet usually overcame the interference. I would imagine using a microwave in the vicinity of the unit would really fry the signal.
But for $24.95 new at a National chain of discount stores, these do exactly what I needed. There are far better units out there but as for functionality and bang for the buck, these are going to be hard to beat! They meet my needs.Buy Sentry Wireless Headphones HO800!