I was looking for a wireless headset for quite sometime now, was not sure which one to buy, as most of the reviews of all the wireless headsets were not encouraging. However, I decided to try RS-120 and got them from Amazon.There is no user manual as such with the item. There are 3 or 4 loose sheets with different types of instructions which are not very descriptive.I connected the transmitter to a wall socket and charged the headset for about 3 hours. I was not sure where to connect the RCA cable, as there were many holes on my LCD HD TV, and no headphone jack. I connected the RCA cable to back of my TV where it said "Audio Out - Line". The transmitter light (green) did not turn on. There was some hiss in the headphone. I changed transmitter band and tried to tune headphone. Still no sound, but just hiss. I was bit nervous. Since I was not sure about TV RCA connection, connected the transmitter to my laptop audio output jack, using the supplied RCA-audio jack adapter (very nice accessory). The green light came on, and it worked!Then I connected the transmitter back to the TV to the same RCA holes, and this time it worked! Good thing about this is the TV volume can be on or muted.The sound quality is absolutely great, clear and stereo. The headphones are light and comfortable for continuous use. I have not yet checked the battery life or the range. But the headphones work clearly in all the rooms in my house. 

Question: How can I raise the volume to the music?
Answer: connected the transmitter to my laptop audio output jack