1. Hold the Trainer with Tongue Tag up.<br> 2. Place the Trainer into the mouse.<br> 3. Keep tougue positioned on the Tongue Tag.<br> 4. Gently bite down on the Trainer.<br> 5. Keep lips together and Breathe through nose.<br> 6.Product for adult.<br> Packing List<br> 2pcs/set for sale<br>