- Color: Green<br>- Tension: 5 pounds (for adults)<br>- Strengthen and stretch the fingers<br>- Unique ergonomic design allows you to exercise the fingers， wrists and forearms while  <br>practicing the correct action for playing musical instruments<br>- Increases finger speed， strength and independence<br>- The span between fingers can be extended and strengthened by progressively shifting the fourth  <br>button away from the others<br>- Compact !#!amp!*! ultra-light， can practice without instrument anywhere !#!amp!*! anytime<br><br>                                                                                                                                Dimensions: 3.35 in x 2.80 in x 0.91 in (8.5 cm x 7.1 cm x 2.3 cm)<br />Weight: 2.29 oz (65 g)<br /><br />