The DSC PG9945 Wireless PowerG Door/Window Security Contact Sensors provide wireless and Wi-Fi connectivity, making them ideal for both indoor and outdoor use. These white sensors, manufactured in 2014, are compatible with DSC systems and can be programmable with features like LED indication and wall mounting. They are powered by 3V batteries and have an operating sound rating of 90 dB, offering reliable home security surveillance with smart home compatibility through IFTTT and Apple HomeKit.