Features: Exquisite appearance design, easy to carry, especially suitable for outdoor work, outdoor travel and security night patrol-, and all kinds of dog training use. Prevent- dog attacks, issue ultrasound to repel- dog or wild wolf-. Keep hostile dogs away and protect yourself from dangerous- dogs while walking or cycling. Stop dog that approaches you before he can bite you, a good protector for yourself. In normal situation, it can be used as a normal flashlight to illuminate- at night-. Specifications: Material: Plastic Size: Approx.12x4.7x3.4cm/4.72x1.85x1.33inch Color: Dark Gray, Black(optional） Package Includes: 1x Ultrasonic Dog Repeller note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.