General DG168 Battery Powered Photoelectric Smoke Alarm with excellent stability and high-sensitivity . Key Specifications/Special Features Power Source: 9V Battery (included). Audio Alarm: ≥ 85dB/3m Temperature Range: 0? to 40? ... - Update: 2011-07-13

General DG331 Wireless Interconnect DC 9V battery powered Photoelectric Smoke Alarm uses 433MHz radio frequency to both transmit and receive messages about a hazard in the home; when one alarm sounds, all will sound. Key Specifications/Special ... - Update: 2011-07-13

General DG321 AC/DC Powered Photoelectric Smoke Alarm with excellent stability and high-sensitivity by Advanced MCU Expert Algorithm Software. Key Specifications/Special Features Advanced MCU Expert Algorithm Software to prevent the most ... - Update: 2011-07-13

General DG312 Battery Powered Photoelectric Smoke Alarm with excellent stability and high-sensitivity. Key Specifications/Special Features Power Source: 9V Battery (included). Audio Alarm: ≥ 85dB/3m Temperature Range: 0? to 40? H... - Update: 2011-07-13

General DG313 Battery Powered Photoelectric Smoke Alarm with excellent stability and high-sensitivity by Advanced MCU Expert Algorithm Software. Key Specifications/Special Features Advanced MCU Expert Algorithm Software to prevent the mos... - Update: 2011-07-13