The Emson 1014 Robotwist Automatic Jar Opener high-quality design makes opening stubborn jars convenient, fun and easy. Just position Robotwist , adjust, press the green button, and watch it un-lid tight fitting jars on its own! No-slip clamp adjusts itself and grips around tight-fitting lids. Robotwist will even open slippery, wet jars as a result of leaking. Robotwist is battery-operated and consumes very little energy. Make those batteries last a long, long time! Compact, and portable, Robotwist's ergonomic design makes storage a breeze. Moreso, Robotwist doesn't utilize blades or electricity so it is 100% safe and environment-friendly.