Tellur Smart WiFi Smoke and CO Sensor white

 Power supply: 2x1.5V AA Alkaline Batteries, replaceable Battery life: Up to 3 years Detection range: Up to 50m2 Alarm sound level: 85dB at 3 meters Sensor type: Infrared Photoelectric Smoke alarm sensitivity: 0.09 - 0.17 dB/m CO alarm sensitivity: 50ppm - 60~90min 100ppm - 10~40min 300ppm - ≤3min Mute period: 10 minutes Push notifications: Yes History record: Yes Self test: Yes Low battery notifications: Yes, 2.6 ± 0.1 V Smart App name: Tellur Smart Compatibility: Devices with Android 4.1 / iOS 8 or higher Power consumption: <15uA (standby); <70mA (alarm) WiFi standard: IEEE 802.11b/g/n Supported WiFi network: 2.4GHz Working condition temperature: 0°C - 40°C Working condition humidity: 10% - 95% RH Housing material: ABS Product dimensions: Φ120 x 31mm Product weight: 150g Package includes:  1 x Smart WiFi Smoke and CO Sensor 1 x Screws kit 1 x User manual