Precautions for wearing: Considering that some cats may not be used to wearing collars and slipped the collar, we design the buckle to be a little tight at the beginning of use, but don't worry, it will become much easier after using it several times. Free your hands - When you come home after a busy day and don't have the energy to play with your pet baby, or if you need to focus on your things for a while and don't want to be disturbed by your cat, this automatic cat toy can free your hands! For both long and short haired cats - The light tube can be adjusted up and down within range of 41 to meet the requirements of light pointing to the floor, wall or higher position; and the light beam is soft, no harm to their eyes. Working Mode - 2 light modes: normally on and flickering; You can select corresponding working mode according to your cat's interest; it will work for 15 minutes under either of these 2 modes, then goes off automatically, and light on again after 1.5 hours; so it gives you time to recharge, or take it off of the cat/dog. Adjustable Collar - The cat collar has a great range of size adjustments from 200mm-310mm. It can be adjusted to fit all sizes of cat's neck and small dogs that like to chase also;Rechargeable -This cat collar light toy is rechargeable. The package comes together with a manual, and a USB charging cable which can be plugged in to charge. The working time is about 2-4 days after fully charged; Tips on how to wear: Make sure to wear this on with the USB charging port side facing to the bottom.