• LCD Screen: Comes with a 2.8-inch screen, supports 320*240 resolution
• One-click Viewing: Visitors are clearly visible by pressing the viewing key
• Design Reason: Low power chip, the longest standby time can be up to 120 days
• Power Supply: The doorbell is powered by 1.5V AA x 4 (not included), easy to use 

Specifications:

• LCD screen: 2.8 inch
• Resolution: 320*240
• Memory: No
• Battery: 1.5V AA x 4 (not included)
• Camera: 1 MP
• IRLEDS: No
• Material: ABS plastic
• Vision angle: 90° 
• Indoor part: 127 x 68 x 13mm
• Outdoor part: φ32mm
• Door peephole: φ14-28mm
• Door thickness: 40-100mm
• Temperature: -20℃~55℃