brand new and high quality This ultrasonic repeller is more than 20k hz and only animals can hear it. It is no harm to human being. It can be a trainer or a repeller if you are scared of . You can your dog some customs with this repeller. Powered by dry battery and durable. 1 pc of dog repeller only,other accessories demo in the picture are not included Type:Ultrasonic Power Supply:1 x Dry Battery(Not included batteries) :1 Pc Colour:Black Material:plastic Size: Length:12.5cm(4.91in) Width:4.7cm(1.85in) Height:2.5cm(0.98in) Package Contents: 1 * dog trainer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.