The Angel Tuners consist of 3 tuning forks, 4225Hz, 4160Hz and 4096Hz. They are a very high frequency compared to other sets. Hold 2 forks in one hand and the 3rd in the other hand, tap then move them slowly around and above the head. You don't need to tap loud. In fact, too loud will be disturbing to someone not prepared or ready. Do not tap them by someone's ears.
The 4096Hz, known as the Crystal Tuner, can be used by itself. The Crystal Tuner when used with a single pointed clear quartz crystal is one of the most powerful tuning forks available. When you point the crystal at a specific location on the body then tap the tuning fork against the crystal, the vibration is amplified as it passes through the crystal. The result is a focused beam of energy.
Update: Here's a video on how to use the Angel Tuning Forks and the Crystal Tuner.