This product is final sale. Banana Bros’ OTTO is an ergonomic automated grinder that will conveniently fill your pre-rolled cone with your choice of dried flower in seconds. The automated device can evenly grind and pack 20-30 cones per charge. Employing its own innovative AI grinding technology, the OTTO has been engineered with a spring-loaded grinder that mimics human hand gestures, allowing flower to be consistently ground.