Pet Gentle Ultrasonic Anti-Barking Trainer LED Light Gentle Chase Material: Plastic Size: 13.7 x 5.5 x 2.5cm Battery: You must bring your own 9V battery Package includes: 1 x Ultrasonic Dog Trainer, 1 x User Manual, Battery Not Included. Notes: 1. Please allow 2-3cm differs due to manual measurement. 2. Except for different computer display colors, the actual color may be slightly different from the following images, thank you for your understanding.