Specifications:

• Working Frequency: 2.4GHz WiFi Door Window Sensor
• Use time: 1 years(10 times/day);
• USB Port Power: Yes, 5V 1A USB Power
• Product Name: ZigBee Door Sensor
• Origin: CN(Origin)
• Model Number: RH-ZDS3 Door Window Sensor
• Low Battery Alert: Support
• Battery: CR123A Built-in Not Rechargeable
• Alexa Echo Show: Yes