The ray of light is integrated into the collar to keep the ray point in front of cats at all times, whether they're jumping or running. Cats are always attracted to chase them, making it is ideal for anyone who works from home and needs time to focus or relax. The adjustable collar length of 240-340mm and 45-degree flexible light pointer head ensure that it suits most cat sizes. At only 1 oz, it's light enough for cats to wear even when pursuing.