First new design in ages, upgraded camera, serious performance and longer battery life make it a standout year
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Optical-based smoke alarms use light instead. They are slightly better at detecting the large smoke particles created by slow, smouldering fires. When such particles enter a chamber in the device, they scatter light from a small light source, which is then picked up by a photoelectric sensor.
so much texture: DES's origins in the ATM, the 3624 PIN format, the dumb
송광사 찾은 李대통령 내외…“고요함 속 다시 힘 얻어”