Battery specification: CR2450×2
Standby current: ≤1μA
Alarm current: ≤20mA
Working temperature: -10°C～+50°C
Relative humidity: ＜95% (no condensation)
Low battery alarm & 5 years battery life
Product size: 70×31.5×15.5mm (large), 70×11×13.5mm (small)