This product does  not contain a power adapter, power adapter, if necessary, make an additional  payment of $ 9.99

Dimensions (L)120mm x (W)83mm  

And a version of the comparison:
Re-designed to  optimize the line, an increase of volume control, sleep switch;
Interface  using a high-quality accessories;
Carefully selected high-quality power to  ensure a sufficient supply current;
Internal wiring using Teflon Silver Line  to ensure that signal transmission fluid;
Re-design made of shell, look more  attractive.

 

The Muse  T-Amp is a so-called Class T integrated amplifier, based on the  TA 2020 chipset.  the chip makes use of a kind of "Digital  Power Processing", this is, more or less, a Class D amplifier with high rate  switching properties. That is why they put the word "digital" into it. Actually,  there's nothing really digital inside, not in terms of D/A conversion. You can  view the official TA2020 datasheet, with detailed tech specs,   The Muse T-Amp is nothing else than a pure and simple  application suggested by the chipset datasheet. No magic.

Class T Integrated  Amplfier
1 RCA Inputs
High Quality Components
Bridged Output  Amplifier

  1. FEATURES

     High  Efficiency    81% @ 23W, 4O

 90% @ 12W,  8O  

NOTE!

The machine is BTL  output, that is to negative side of speaker out is not public grounded (the two  speakers cable must independent connect, no grounding together), we must  strictly in accordance with the marking of plus or minus cable connection,  this T amp is not recommend for car or  bike use, if the DC volts input higher than 14V or we may damage IC. If the damages are caused by  non-attention on instructions all fees need to pay for maintenance.