Specifications:

• Working voltage: DC 5V
• Type: Smoke Detector
• Static current: Less than or equal to 20mA
• Operating temperature: 0°C to 50°C
• Model Number: FD438W
• Low voltage alert: 3.9V±0.3V
• Humidity range: Less than 95%RH (no freezing)
• Brand Name: FD
• Battery: 10 year lithium battery
• Alarm sound: More than 80 db
• Alarm current: Less than or equal to 350mA