Power Supply: DC 9V battery operated 

Sensitivity to co: conforms to EN50291standard
Sensitivity to smoke: comply to EN14604 standard
Standby Current: <50µA

Alarm Current: <20mA
Operation Ambient Condition: 4~38℃, 25~85%R.H.
Sensor Type: CO: electrochemical   Smoke: photoelectric
Battery spec: DC 9V Carbon Zinc 6F22 or Alkaline 6Lr61, 1604A for ANSI,6AM6 for JIS
Alarm sound : ≥85DB at 100cm @3.4±0.5KHz pulsing
For  smoke alarm: The alarm sound pattern is : BI 0.5s - pause 0.5s – BI 0.5s – pause 0.5s – BI 0.5s – pause 1.5s, with a corresponding LED flash ,repeat this alarm pattern)
For CO alarm: The alarm pattern is: 4 short beeps-followed by 5 seconds of silence-followed by 4 short beeps

Packing Size: 150mm x 145mm x 45mm

weight: 0.21kg