Ever has experience of chasing or barking by dangerous dog? If the answer is yes, this is just the right application for you. Dog repeller is useful when you go walking, cycling or jogging especially when you are alone. In fact, it produce a high frequency sound that human ear unable to hear and deter vicious dogs without harming them. The latest version of Dog Repeller allow user to adjust frequency. It is a must-have for every single mailman. However, the only bad thing about the application is that the best effect can only be showed through using iPhone 4. While for other phone types, system volume may have to be maximize in order to get effect.

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