Specifications

• Power supply : Mini USB , 5V-1A
• Backup power supply : CR123A x 2 (optional)
• Sound intensity : 100 or 120 dB
• Wireless Type : 2.4GHz, 1T1R
• Protocol : IEEE 802.11b/g/n
• Wireless Range : 45m
• Operating Temperature : 0°C~ 40°C (32°F~104°F)
• Free app : SENSINOVA
• Support systems : Android or IOS
• Support : Workes with Alexa Echo and google home
• Product size(D*W*H) : 68x 68x 30mm
• Note : it is powered by USB power adapter normally,batteries are just for back up.(batteries can last two days).