A motion activated, water resistant dog ball for you and pooch to keep on playing on dark doggy walks. The ball is visible for up to 40 metres, making it easy to find for your dog. The ball has a rubberised feel, but isn\'t a \'bouncy\' ball, and shouldn\'t be used by destructive chewing dogs, as it contains batteries and LED bulbs! The batteries are replaceable and one set should last 10 hours, which is about 120 throws. The ball has a 6cm diameter, as a guide, a tennis ball is around 6.5cm. The ball is water \'resistant\', so not for throwing into water, but it will withstand rainy weather and dog slobber. NOT a chew toy...dogs must be supervised!6cm Diameter3 x replaceable LR44 batteries included.Green LEDLights on impactWater resistant