Built-in noise-canceling speaker for clear two-way voice calls. WiFi hotspot link for seamless remote viewing on mobile phone. Remote control night vision feature for enhanced security. Wide-angle lens with human monocular level viewing angle. APP remote real-time alarm push for versatile security applications. Item Name: Camera Material: ABS Features: Versatile, Convenient, Durable Product Name: A4 Alarm Linkage: APP Push Night Vision: Automatic Infrared Night Vision Motion Detection: Support Audio Speaker: Supports Voice Intercom Charging Interface: USB Resolution: 1280*720 Memory Capacity: Supports TF Memory Expansion Size Details: L: 6.2cm/2.44", W: 4.8cm/1.89" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Camera