Our company sticks to the principle of "Quality is the life of the company, and reputation is the soul of it" for Door Sensor Alarm For Home Security, Personal Alarms For The Elderly , Door Contact Alarm , personal alarm keychain ,Windshield Breaker . All prices depend upon the quantity of your order; the more you order, the more economical the price is. We also offer good OEM service to many famous brands. The product will supply to all over the world, such as Europe, America, Australia,Bogota , Ottawa ,Ecuador , Qatar .Our company will continue to adhere to the " superior quality, reputable, the user first " principle wholeheartedly. We warmly welcome friends from all walks of life to visit and give guidance, work together and create a brilliant future!