(november ) ( learn how and when to remove this template message ) ( learn how and when to remove this template message ) parental controls are features which may be included in digital television services, computer and video games , mobile devices and software that allow parents to restrict the access...
devices sensors, bases & call points relay base standard base resettable call point waterproof resettable call point detector bases class a r & b heat heat lite sounders & beacons waterproof wall sounder wall sounder sounder & sounder beacon base slave sounder & beacon base modules single input monitored...
speakers are a woofer, a tweeter, and a crossover network. the woofer and tweeter are cones that provide low and high frequencies respectively, while the network filters the sound. for more impressive bass, look for speakers that also have subwoofers to amp up lower frequencies and provide richer sound. wired...
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