This timer aids the development of transitional skills by providing a warning cue to indicate the end of an activity, helping students predict and prepare. Can be set to give both an auditory and visual cue to indicate time –- a bonus for students who have deficits in hearing or vision. # Pieces In Set: 2 Number of Batteries: 3 Learning Skill: Math Power Source: Battery (not Included) Recommended Ages: 6 Years And Up Measurements: 6.1 Width/Inches, 4.1 Height/Inches, 6.1 Length/Inches Assembly: Assembled Base Material: 100% Plastic Care: Wipe Clean Country of Origin: Imported