3 in 1 gas alarm with back up battery

1.Hot wire type sensor
2.POWER:110VAC/220VAC/230VAC
3.Working temperature: -10degree~60 degree
4.Alarm density: Coal gas: 1000~5000ppm, Liquid petroleum gas:1000~10000ppm, natural gas: 1000ppm~5000ppm
5.Interconnecting Gas detector  
  (1)Circuit for normally closed rely contacts
  (2) Circuit for normally opened rely contacts
  (3)Operating Frequency: 433 MHZ/315MHZ (optional)
6.SIZE:163mm*87mm*40mm
7.Weight:400g/pcs
8.Package size:65cm*46cm*39cm
9.Quantity/Box:100pcs
10.CNT Weight(kg):45kg