How is the speaker powered?
The LR-600 comes with an AC Power Supply or you can use eight AA batteries to power the speaker.

Can I use the LR-600 with the transmitter and another audio source with the Speaker/Receiver?
Yes. The LR-600 has audio input connectors on the back of each unit to interface to projectors, laptops, DVD etc.

How many speaker/receivers can I have in a system?
As many as you need, the number is endless.

How long do the batteries last on the LR-600?
Alkaline batteries last 14 hours. NiMH rechargeable batteries last 7 hours with voice transmissions.