Note: Proffessional trainer emits a high frequency sound that commands your pet’s attention, so he obeys your commands. The sound is silient to people, but clearly audible to dogs and cats How To Use Pet Trainer: 1. Point your pet trainer directly at the dog or cat always using an outstretched arm from a distance of approximately 6 feet away(effective up to approx. 20 feet) 2. Give the verbal command, then immediately press the button for one or two seconds 3. Repeat steps one and two until your pet responds to your commands Specifications: Material: ABS Frequency:35-45HKZ Size: 4.3x1.5x0.8in Power: Uses one 9V Alkaline battery Box Contains: 1 x Repeller 1 x Instructions