Features :

This product is a smart voice CO and smoke detector, using advanced electrochemical CO sensor and infrared light sensor, with high stability and small sensitivity drift.

Using microprocessor intelligent control, built-in voice chip, operation live voice prompts.
Backlit digital display alarm concentration.
With back-up battery function, 1.5V*3 battery can be used for power supply.
High reliability sensor design, efficient and stable inductive transmission.
Low current consumption, long standby life, low battery indication.
Sensor failure self-test function.
Alarm memory function, you can view the alarm record at any time.
Live sound and light alarm LED indicates alarm when gas leaks.
SMT industrial manufacturing, strong stability.
?

Specification :

Power supply: 3pcs 1.5V AA battery(Not included)
Static current: <80UA
Alarm current: <30MA
Alarm voice: Smart human voice
prompt Sensor: Electrochemical carbon monoxide sensor and Infrared photoelectric sensor
Temperature: 0??50??br /> Relative Humidity: 10-95%
Carbon monoxide sensor detect concentration: 000-999PPM
Smoke sensor sensitive: 0.1%db/m-9.9%db/m
Alarm indication: LCD display, voice prompt
Battery capacity: Low battery alarm
Dimensions: Approx. 10x10x4cm / 3.9x3.9x1.5inch
?

Package includeds :

1 x Alarm
1 x User Manual
?