WiFi Temperature Humidity Sensor USB Powered Wireless Tuya APP Smart Alarm Detector Home Security System Specification: Sense the temperature and humidity, an alarm will be issued if abnormal. Battery Powered: CR123A X 2 (NOT Including) External Power Supply: Mini USB, 5V 1A Wireless Type: 2.4GHz, 1T1R Protocol: IEEE 802.11b/g/n Speaker Sound Intensity: 85dB-105dB Working Temperature: 0-40℃ Operating Temperature: 0°C~40°C (32°F~104°F) Working Humidity: 20%~85% Storage Temperature: 0°C~60°C (32°F~140°F) Product Size: 68 X 68 X 30mm/2.68 X 2.68 X 1.18" Product Weight: 72g Packing Size: 85 X 95 X 50mm/3.35 X 3.74 X 1.97" Package Weight: 82g Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3mm measuring deviation due to manual measurement. Package included: 1 X Temperature Humidity Sensor 1 X Manual