PetDroid Boltz Hanging Automatic Interactive Laser Cat ToyThe laser will automatically turned off after 10 minutes(update to 10 minutes now,not 5 any more),prevent your cat from being over stimulated The laser moves randomly across floors and walls which appeals to natural hunting instinct of cats Requires 3 AAA batteries(not included),for best performance,suggest using alkaline batteries Suction cup could only adhere to smooth clean surface,it would be more stable with a bit water,there are also