SPECIFICATIONS Material: ABS Color: White Battery type: Built-in 10-year lithium battery (CR123A 3V) Battery capacity: ≥2400mAh Smoke sensor: Infrared Photoelectric Sensor Alarm output: Flash Sound output Sound level: More than 85 dB/3 Merer Static current: ≤15uA Alarm current: ≤300mA Working temperature: -10℃ ~ 55℃ Working humidity: RH 15% ~ 95% WiFi: IEEE 802.11 b/g/n 2.4G Wireless: RF433MHz Frequency This product adopts the latest design of microprocessor intelligent chip and electrochemical sensor, the performance is stable and reliable, the current consumption is small, and the sensitivity drifting is small. Built-in 10-year lithium battery (CR123A), don't worry about the need to replace the battery every year. It can be used in conjunction with Tuya or the Smart Life APP, to view and receive alerts through the APP, even when you are far from home, without any gateway, just connect to your home WiFi. Main Feature: When one of the sensors is activated by smoke, all connected smoke detectors will alarm. When the WIFI version sensor gets an alarm, your phone will also get an alarm in time. Wireless technology with a transmission range of over 100 m (under the open sky) sends and receives messages about fire hazards in the house using radio frequencies, so you get every extra life-saving second to escape. Featuring a relay function that extends transmission range, this radio-interlinked alarm can be interconnected with up to 24 smoke alarms to create a smart home network with no blind spots, even on different floors or in the basement and garage. The WIFI version sensor is as close to the location of the router as possible to ensure that the WIFI signal is effective. Combination A: (1pcs WiFi Sensor + 2pcs RF433 Wireless Sensor) Combination B: (1pcs WiFi Sensor + 3pcs RF433 Wireless Sensor) Combination C: (1pcs WiFi Sensor + 4pcs RF433 Wireless Sensor) Combination D: (1pcs WiFi Sensor + 5pcs RF433 Wireless Sensor) Combination A Real Display: (1pcs WiFi Sensor + 2pcs RF433 Wireless Sensor) Advanced photoelectric detection element: High sensitivity, low power consumption, no nuclear radiation concenrns. Mute function: Avoid false alarm when someone smoke at home (silence for 15 minutes). If the semsor detects smoke, your phone can get danger alarm. Suitable for dining room, living room, hallway, shed, warehouse. Insect-proof net design to prevent mosquitoes from false alarm. Dual emission technology: Improve anti false alarm at 3 times (self-checking: 40s once). High decibel: You can hear the sound in outdoor (85db/3m). Audible and Visual alarm / Long standby time 10 year battery / Low battery warning. ADVANCED PHOTOELECTRIC DETECTION ELEMENT/ ADVANTAGE 1. AGAINST FALSE ALARMING ADVANCED PHOTOELECTRIC DETECTION ELEMENT/ ADVANTAGE 2. INSECT-PROOF NET DESIGN Suitable for Hotel use, Home use, Office use, Supermarket use.. AVOID FALSE ALARM WHEN SOMEONE SMOKE AT HOME (SILENCE FOR 15 MINUTES) ADOPT MCU AUTOMATIC PROCESSING TECHNOLOGY IMPROVE PRODUCT STABILITY HIGH DECIBLE (85DB / 3M) YOU CAN HEAR THE SOUND IN OUTDOOR ADOPT MCU AUTOMATIC PROCESSING TECHNOLOGY IMPROVE PRODUCT STABILITY INSULATING SHEET PROTECT IT IN SHIPMENT (NO FALSE ALARMS) 100% Real Shooting 01 by VINRUMIKA 100% Real Shooting 02 by VINRUMIKA 100% Real Shooting 03 by VINRUMIKA EASY INSTALLATION 1. Turn the alarm anticlockwise out of the ceilingmount 2. Flx the ceilingmount withscrewst 3. Turn the alarm clockwish until you hear a "click" 4. Installation completion test