*This detector is operating by temperature differential sensing theory, with ULapproval sensor to connect with metal. It`s made by high quality material, excellent contact to enhance its ability to o

*This detector is operating by temperature differential sensing theory, with ULapproval sensor to connect with metal. It`s made by high quality material, excellent contact to enhance its ability to o

* Heated sensing diaphragm can oparate consecutively for unlimited times, not effected by temperature,especially the conducting part use gold coating to avoid oxidation. * Use alloy air equalizer to

* Heated sensing diaphragm can oparate consecutively for unlimited times, not effected by temperature,especially the conducting part use gold coating to avoid oxidation. * Use alloy air equalizer to

* Easy installation: Install directly to proper location without any wiring. * Longer operating life: Minimum one-year battery life under normal operating. * Low battery warning: Unit ``beeps`` every

Characteristic : (1) Flame-resistant frame and pc cover (UL-94 Standard) (2) Easy maintenance (3) Hangings type (4)ABC fire retardant material

Characteristic (1) Frame material :VO GRADE, ABS fire retardant(UL-94 rules) C (2) Lamp :Select 6V4W tube, light head and shell lodge by spinning, keep in good repair C (3) Reserve power :Cells of wa

Characteristic (1) Frame material :VO GRADE, ABS fire retardant(UL-94 rules) C (2) Lamp :PL13W fluorescent light (900LUM) C (3) Reserve power :Cells of water and maintenance free, fit in UL ISO-14

Characteristic (1) Frame material :VO GRADE, ABS fire retardant(UL-94 rules) C (2) Lamp : Select 6V4W tube, light head and shell lodge by spinning, keep in good repair C (3) Reserve power :Cells of w