Trill TR 825 is a powerful and professional audio speaker. Radio waves represent part of the electromagnetic spectrum. An antenna and receiver on the wireless speaker  detect the radio signal, and the receiver  converts the radio signal into an electrical signal.An amplifier boosts the power of the signal from the receiver so that it can drive the speaker.
The speaker is good in size its is made of a good material. it is affordable and amplifies music very well.It can be used for different occasions. 
Trill 825 boosts of using Stereophonic sound it is a method of sound reproduction that creates an illusion of multi-directional audible perspective. This is usually achieved by using two or more independent audio channels through a configuration of two or more loudspeakers (or stereo headphones)