The CentralAlert Mini Notification System alerts you to incoming calls from your home and cell phone and text messages while the weather-resistant, wireless doorbell lets you know that a guest is at your door.
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**WEA - Wireless Emergency Alert - Check with your cell phone service provider to confirm they provide WEA alerts.
Land Line Phone Ringinng Signal: >40 vrms, 20 - 65 Hz
USB Charge port Output: 5VDC 650 mA max (used with AC adapter only)
Bed Shaker Output: 9VDC 300 mA max
Input Voltage: 9VDC 100 mA
Dimensions: Approx. 116 mm x 85 mm x 90 mm (W x D x H)
Weight:Approx. 225 gm (0.5 lb. without batteries)
Battery Backup: 4 x AA alkaline (not included)
Operating Temperature: +10 to +40 C
Door Bell Battery: 3 volt lithium coin battery, Model CR2032 (included)