Shelly Plus WiFi Suitsuandur

Size (DxH): 86x31 ±0.5 mm / 3.39x1.22 ±0.02 in 
Weight: 95 ±1 g / 3.35 ±0.05 oz
Mounting: Ceiling
Shell material: Plastic
Color: White
Device lifespan: 10 years
Ambient temperature: -0 °C to 55 °C / 32 °F to 131 °F
Humidity: 30 % to 95 % RH
Power supply voltage AC:  N/A
Power supply voltage DC: 1x 3 V CR123A/CR17335 battery 
Battery lifespan: 5 years (with original battery)
Smoke sensor: Photoelectric 
RF band: 2400 - 2495 MHz
Max. RF power: <20 dBm 
Wi-Fi protocol: 802.11 b/g/n 
Wi-Fi Range: Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors  (Depends on local conditions)
Bluetooth Protocol: 4.2
Bluetooth Range: Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends on local conditions) 
CPU: ESP32-U4WDH
Flash: 4 MB
Firmware capabilities  Webhooks (URL actions): 10 with 2 URLs per hook
Scripting: No
MQTT: Yes 
CoAP: No