The classic mouse toy with a twist! Play-n-Squeak® toys produce an amazing RealMouse™ sound: a "squeak" that's the same frequency as a real mouse! This squeak stimulates your cat's hunting instincts. Don't be surprised if your cat brings you his "kill" as a gift - it's that realistic! MouseHunter™ toy (CT-10158) includes long-life batteries and catnip.