Although there's a fold-out manual for the DT-900, it's absolutely not needed - this is plug and play tech. The main charging plate is very solidly made out of plastic, with a hard rubber perimeter on the bottom to keep it firmly seated on a desk or table. The upper surface has a raised circle to show roughly where the charging coil is - it's raised to stop dust or dirt that will naturally collect on this usually exposed surface scratching or otherwise messing up your smartphone's pristine back.