How is the base station powered? The Lavalier remote mics? It says 2 9-volt batteries for "test only."
2052918
The base is power by an A/C adapter and the 2 wireless units use a 9 volt battery. If I recall correctly they came with a 9 volt battery that had enough charge to test the units with.
2052919
Dr. Dave, the base is just a wall plug and the mics are either 9 volt or AA batts. Pretty simple. They are good for occasional use. They aren't super high quality but can work in a pinch. Feedback happens.
695162
Are all controls turned down except the wireless volume? Is the battery in the transmitter fully charged? Are you unplugging the mic or actually turning the switch off? Is the other mic accidentally turned on when it should be off? Does the other mic work properly? Try walking about 50 feet away from the main unit with the lapel mic on. Does distance cause the buzzing? The only time I have heard buzzing is when the mic gets too close to the front of the speaker. If all else fails, find an expert who can diagnose it thoroughly or send it back for repair. The problem should be easy to diagnose with the proper tests (some of which I have listed above). Are all controls turned down except the wireless volume? Is the battery in the transmitter fully charged? Are you unplugging the mic or actually turning the switch off? Is the other mic accidentally turned on when it should be off? Does the other mic work properly? Try walking about 50 feet away from the main unit with the lapel mic on. Does distance cause the buzzing? The only time I have heard buzzing is when the mic gets too close to the front of the speaker. If all else fails, find an expert who can diagnose it thoroughly or send it back for repair. The problem should be easy to... » Read More Are all controls turned down except the wireless volume? Is the battery in the transmitter fully charged? Are you unplugging the mic or actually turning the switch off? Is the other mic accidentally turned on when it should be off? Does the other mic work properly? Try walking about 50 feet away from the main unit with the lapel mic on. Does distance cause the buzzing? The only time I have heard buzzing is when the mic gets too close to the front of the speaker. If all else fails, find an expert who can diagnose it thoroughly or send it back for repair. The problem should be easy to diagnose with the proper tests (some of which I have listed above). « Show Less
51671
The base uses 2 AAA batteries or you can plug an AC adapter into it. Then you plug the base into your tv. These are great sounding wireless headphones, especially for the price! I had a pair of sony wireless rechargeable headphones that were $100 and these sound so much better!
371656
Not that I can see. The back of the instrument has 3 jacks--Line out, Mic, and Phone. I'm thinking its battery powered only.
626203
It doesn't utilize a battery, it uses power from your camera. You do control whether your mic is on or off (if it's off, you'll record from the camera mic), and the direction the sound capturing takes.
2263350
There are batteries in both the transmitter (a 3 volt lithium ion battery) and the receiving station (3 C cell batteries).
633068
2 AA batteries (included) for the remote control, otherwise the entire thing runs on AC power (no backup battery for the clock, but it will remember your station presets while the power is disconnected).
1333137
No, it only has one male XLR connection. I use a standard balanced microphone cable to take the output of the XLR Preamp to the input of my PA or Ultrasound amplifier. If it detects phantom power, it will use it rather than the 9v battery.
2220765
The unit has a built in amplifier. You just put a battery in the microphone, put batteries in the amp (or plug it in the wall), and you have a portable PA system. Works great for a small room. Recently used it for speaking to and playing music for about 50 people.
1851357
It uses 3 x AAA batteries. One for the microphone and two for the receiver. It does come with one set of batteries.
76109
it works with batteries and can be plugged in. it even has a remote control! I think the only negative I have ever had about it, cause I love it, is that the preset radio stations are hard for me to set up. I recommend this unit very highly.
183120
No it is not a condenser, it's a dynamic mic, it requires no phantom power, +48V
985843
My wife bought this and I just went and looked, it is cordless, battery powered, which works well and last. Answer to the question, on the base.
1879281
you need an amplifier, the base unit plugs into the amp and the mics go through the base and is amped
1822866
There is a red and black wire to power the unit with...12v dc. There are four other wires for two outputs that are remote controlled. Connect the devices you wish to run remotely to those wires.
2102399
I haven't tried to run the units for that many hours. The receiver has a electric cord. So, if you have access to an electrical outlet, you should be good to go. The lapel mic and the over-the-ear head mic plug into a small cigarette sized transmitting unit which is powered by a small 9volt battery. The handheld mic has a cavity where you plug in its 9volt battery. I have never run a battery unit - a flashlight or a weed-whacker for more than an hour, have you? Just bring along two(2) extra 9volt batteries. They are easily changed in the breathing spaces between your talking. Good luck. It sounds like it could be a very intense class. I haven't tried to run the units for that many hours. The receiver has a electric cord. So, if you have access to an electrical outlet, you should be good to go. The lapel mic and the over-the-ear head mic plug into a small cigarette sized transmitting unit which is powered by a small 9volt battery. The handheld mic has a cavity where you plug in its 9volt battery. I have never run a battery unit - a flashlight or a weed-whacker for more than an hour, have you? Just bring along two(2) extra 9volt batteries. They are easily changed in the breathing spaces between your talking. Good luck. It... » Read More I haven't tried to run the units for that many hours. The receiver has a electric cord. So, if you have access to an electrical outlet, you should be good to go. The lapel mic and the over-the-ear head mic plug into a small cigarette sized transmitting unit which is powered by a small 9volt battery. The handheld mic has a cavity where you plug in its 9volt battery. I have never run a battery unit - a flashlight or a weed-whacker for more than an hour, have you? Just bring along two(2) extra 9volt batteries. They are easily changed in the breathing spaces between your talking. Good luck. It sounds like it could be a very intense class. « Show Less
96746
I use 1 AAA battery to power mine.. Or u can even use hearing aid batteries..