Kidzlane Dinosaur Toy - Dinosaur Room Guard/Motion Sensor - Projects 24 T-Rex Dinosaur Images on Your Wall - Hot Gift Dinosaur Toys for Boys T-Rex room guard has motion sensor and 5 mighty roar sounds T rex roars into action every time an unwanted visitor trespasses into your bedroom! (hidden on/off switch) High technology built in trembler alert and motion sensor to detect movement 24 realistic dinosaur images in your own room on 3 interchangeable discs, Hidden disk storage on dinosaur Projects Images Over 3 Feet, Ages 3 +, Uses 3 AA batteries