AccuBow Archery Training Device Strengthens muscle fiber used in shooting bow Adjustable 10-70 lbs Vibration dampening for unlimited dry firing Official Archery Training Device for US Olympic Shooters Augmented Reality Archery System Increase Pulling Poundage Eliminate Target Panic Improve Holding Stability Increase Shooting Stamina Rehabilitate Injuries Draw Weight adjusts: <span class="a-text-bold">10 - 70 lbs.</span> Unlimited Dry-fire capabilities Laser Sight Stabilization System (included) Draw Length adjusts: 21&#034;-34&#034; Ambidextrous for both Right and Left Handed shooters D-Loop Attachment (included) Stabilizer Adapter built-in Level Bubble Attachment (included) Phone Mount Accessory (sold separately) Get the AccuBow - Phone Mount Accessory Attach your Phone to the AccuBow! Augmented Reality Archery Phone Mount adjusts to fit all phone sizes Olympic Archery Mode Bowhunting Mode Beginners to Experts Kids to Adults Adjust for Strength Level