This is a fun and discreet little device. With remote access you can "discipline" your slave in public and watch them squirm from across the room! The egg is about 3 inches long, 4.5 inches in circumference. The manufacturer states that it has a range of 15-20 feet (4-7 m), yet we tested it and were able to get distances almost twice the manufacturer's. The unit includes batteries for the egg and the remote control (2 AAA for the egg, 1 12v for the remote).