Do these have an auxiliary audio input to use as a wired set if batteries are unavailable?
301906
no. pretty much useless if not wireless..... They do the job though when you don't want the whole house to hear when watching tv late at night. You can also use them with the audio on if you are in the other room. I use when im in the kitchen sometimes while the football game is on and I don't feel like constantly moving in and out. I'm weird.
398570
They can operate without battery but you need batteries if you want to switch on the built in amplifier.
572453
The batteries are not included, and I suggest having a spare set on hand. Dead or dying batteries can result in a cranky baby.
1449314
No they do not. They are not noise canceling or wireless therefore they do not require batteries.
746495
No. these don't. They work only with the USB of your computer. They are just not loud enough. The others which are also Logitech, do need to be plugged in but they give a good sound output. I hope this helped.
979711
No, wired. The wires come with and go into the back; depending on how you attach them or to what, you can barely tell they're wired.
1813637
Yes. You have the option of using batteries or the AC adapter, which is included.
411016
Yes but the first pair I received was wired wrong and did some funky things. The promptly send me a replacement set but unfortunately I never got around to installing them to verify they worked correctly.
1404823
No. You would need a received or amp to power them. You can get a cheap one for about 40$.
773208
Yes. One is plugged in (corded) and it also comes with a cordless microphone (you will need a 9 volt battery for that one). There is also another plug-in for a third microphone.
1689170
Yes, but mine didn't work. Returned them. Battery pack is a better investment.
1006491
There is no such jack on my set....wireless only....mine did include the cable to connect to the source and the base charges the headphones very well....for now anyway, I do wonder about the life span of the included battery pack and the cost to replace it....
1371247
The ones I bought were wired to a circuit and have a battery back up. I did not see any that you just plugged in to an outlet.
908997
Yes, they have a standard headphone plug for input from the audio source of your choice.
452560
No, these speakers get power from a USB port and source input from a hard wired auxiliary cable. There are no other inputs or outputs
1880881
Yes they will work wired without power. However when using the Noise Cancelling feature they will use power from their battery. So if you were trying to use the Noise Cancelling feature with a dead battery you would be out of luck. Otherwise you can simply plug them into any source and listen away.
447764
Yes they do. They need the power source. I bought these for my son. He loves them.