Wickedbone is not a chew toy and not suitable for those aggressive chewers. You need to lift the bone-shaped rubber to charge the unit as there is no connector for the button. This is because the pets may tear the cover from the Wickedbone and swallow. You can also take this off directly, it will not affect playing. However, you should be careful not to lose it. Although Bluetooth connection range is up to 30 feet we recommend that you stay within 10 feet for better stability. Automatic & Intelligent: Choose between interactive auto-play modes or control puppy toy by using joystick in drive mode via the app. It can automatically adjust how it reacts based on different actions of your dog!Auto Play Mode: Programmed to attract your dog’s attention and does not require manual operation! 12 types of emotional driven systems, Wicked bone acts responsively to different types of touch, such as chasing, teasing, avoiding, etc.Drive Mode: Control the dog toy through the Wicked bone available for iOS and Android), and move it with its virtual joystick, choosing between the puppy toy's 9 Available motions, and you’ll soon create and discover new action combos as it runs!Safe & durable: FDA food-grade polycarbonate of the body, cover, and the tires, strong and soft, protects your puppy's claws and teeth.Easy to clean: Its detachable tires and protecting cover are very easy to take off, thus could be quickly and conveniently cleaned! Good puppy chew toy!Long battery life: built-in 470 mAh lithium polymer battery, charging for 1 hour, lasting more than 30 minutes in App mode, more than 2 hours in interactive mode, 1 month in sleep mode! Read the full article