STEALTH PLANKSTER IS THE NEW PORTABLE AND COMPACT HEALTH CLUB QUALITY FITNESS PRODUCT that will push you to a new level of core training in the privacy of your own home. Supports up to 250 lb user. PLAY GAMES on your smartphone by using your Abs. Stealth includes 2 FREE mobile games "Stealth Speed Gliding" and "Stealth Body Fitness" available on both Android and iOS smartphones. FITS ANY SIZE SMARTPHONE FOR A FUN ENGAGING WORKOUT. Stealth takes one of the most basic training exercises, the plank, and turns it into a full-on gaming experience. GET A STRONG CORE AND A HEALTHY BACK in under 3 minutes a day. Stealth Plankster uses your core strength to control the action on your mobile phone screen, making static exercises like the plank more engaging — for your muscles and your brain. NEVER DO BORING PLANKS, or sit-ups or crunches! Stealth’s Interactive Core Trainer makes core planking workouts fun and exciting by integrating mobile gaming. STEALTH PLANKSTER features a proprietary design with 360 degree full range of motion for superior dynamic planking.