This is the starter kit for anyone wishing to install a security system inside the home. Complete with magnetic sensors for windows and doors, the unit detects any forceable break in as well as any suspicious movement in rooms by means of the passive motion sensors. Easy to install and setup, you& 39;ll have your own security alarm system running in no time. It can also be used to play a recorded message or custom sound. Worried there is someone in your house? Features - Color: As shown. - Material: Plastic. - Size: 18.5x12.5x1.5cm. - Home security system complete with fully programmable main unit and sensors. - Door/Window contacts detect any forceful break-in. - Passive motion sensors detect any suspicious movement or activity. - Loud alarm alerts neighbors and deters potential intruders. - Owner of the alarm system is able to listen to the conversation of the intruders on the phone and the owner may re-activate the alarm to go off the second time to frighten the intruders. - Warm Tip: Dear buyer, Due to lighting effect,monitor& 39;s brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand Thank you Specifications - Power supply: DC5V-12V. - Inner Power: Ni-MH battery, 3.7V 500mA. - Working current: 120mA Note: The item comes with US plug/adaptor. Please confirm the voltage of your area before placing an order. Please confirm the voltage of your area before placing an order.