Product Specifications Cat Toys Probing Ball, with a diameter of 50mm(1.97in), using high quality and plush/fabric Each built-in lr44 toys lithium battery cell and high sound sensitivity, which can produce different simulated sounds, the built-in batteries in each ball sustain more than 10,000 times of chirping Simulate Real Sounds Simulate the real sounds of three different animals to attract cats' attention and stimulate the cat's hunting nature. The sounds of different colored balls are different. Blue sound frog Yellow sound of cricket Pink bird sound. Smart Trigger Faucet The Cat Toy Ball has a built-in high sensitivity sounder. As long as the cat's paw lightly touches the ball, it will make a sound. Cat ball toys with funny animal sounds can reduce boredom and increase your cat's activity, thus bringing more fun to your cat. Catnip Can Be Added After opening the lid, you can add catnip to the ball. It can make your cat feel excited and happy, and become your cat's favorite toy. It can encourage the cat to exercise, stimulate the cat's thinking, or accompany the cat, allowing your cat to exercise and stay healthy. Note In order to prevent the kitten from damaging the battery, the battery is built into the toy and cannot be replaced.