12月20日的Dog Repeller应用程序分析

Protect yourself from dangerous dogs while cycling or walking or jogging with the ultrasonic Dog Repeller. It produces a high frequency sound that the human ear can not detect yet it is able to deter vicious dogs without harming them. A must-have for every mailman! Now with adjustable frequency __________________________________ For best results use an iPhone 4 or newest generation iPod and set system volume to maximum