Requires only a tiny sample. Automatically draws blood into test strip.</br>Number 1 Test Strip in the U.S.**Based on sold volume</br></br>Product Description</br></br>For blood glucose testing with OneTouch?? Ultra?? and OneTouch?? UltraSmart?? Brand Meters and InDuo?? Systems.</br><br/>http://www.amazon.com/gp/product/B002FU5WHY