Specifications

• Power Supply : USB 5V/1A
• Backup Battery : CR123A-3V X 2 Volume: 105db (Max)
• Wireless Typ : 2.4GHz
• Wireless Standard : EEE 802.11b/g/n
• Wireless Range : 45M
• Operating Temperatur : 0°C? 40°C (32°F?104°F)
• Operating Humidity : 20% ? 85%
• Storage Temperature : 0°C? 60°C (32°F ?140°F) Storage
• Humidity : 0% ? 90%
• Size : 68 mm x68 mm x33mm
• Support : Amazon Echo
• Note : it is powered by USB power adapter normally,batteries are just for back up.(batteries can last two days)