Please read the profile! ^_^ Record your own voice, and the sound will play when your dog presses the button. Only a little yellow is used. !! Box not included. !! A set of 4 recordable buzzers perfect for pet training. - Brand: MewooFun - Product Name: Recordable Training Buzzers - Colors: Orange, Yellow, Gray, Purple - Quantity: Set of 4 - Features: Recordable, for pet training Thank you for viewing.