Specifications: Color: WhiteMaterial: ABS + High Sensitivity SensorPowered Supply: DC 9V(6F22 Battery, not included)Transmission Frequency: CD50 independent alarm, CD50W wireless transmission(Support)Launch Distance: ≥200M (External aerial 500 meters)Static Current: ≤10uAAlarm Current: ≤40mAAlarm Loudness: ≥85dBEnvironmental Temperature: -10°C - +60°CEnvironmental Humidity: ≤95%RHProtection area: 60 Square MetersInstallation Height: ≥6mSmoke Sensitivity: Ⅱ GradeDimension: 100 x 100 x 34mmWeight: 126g  Features: 1. Support three alarms: independent + acousto-optic + wireless transmission network alarm.2. Full snap-in patented structure, simple installation, no need for debugging and wiring.3. 360 degrees smoke detection and alarm, no dead angle, reliable.4. Built-in high-sensitivity sensing technology, reliable and safe.5. Built-in 110 dB sound and light alarm reminder, effectively prompting people to evacuate.6. Ultra-low-power microcontroller + photoelectric principle technology, long standby life battery use for 3 years.7. Adopt high-performance photoelectric two-way scattering patented technology of two-receiving & one-transmitting, stable, reliable and accurate.8. Low Voltage Alarm: When the battery voltage is lower than 6.8V, a warning sound is issued to remind the user to change the battery.9. Rotary detachable top cover design to facilitate cleaning and battery replacement.  How to use: 1. The battery installation is complete, to press the alarm button by testing alarm and LED Light flash fast.2. After installation, the alarm should flash one time per 45 seconds, it will keep warning till air back to fresh when meet smoke.3. It will transmit a signal to host, also can test it by smoke(For sure working fine, you can test it weekly.)  Package Included: 1 x Wireless Smoke Detector1 x User Manual    More Details: