【High-Definition Visibility】3.5-inch IPS screen with 480*320 resolution provides a clear 35° viewing angle for enhanced security monitoring. 【Secure 2.4G Transmission】Utilizes a private 2.4G protocol for long-range, strong signal transmission without WiFi, ensuring information security. 【Two-Way Audio Communication】Equipped with built-in speaker and microphone for seamless video and audio intercom functionality. 【Night Vision Capability】Infrared night vision ensures clear visibility even in low-light conditions. 【Easy Installation】Wireless setup with one-key pairing makes installation quick and convenient. 【Efficient Storage】Supports SD card storage up to 256GB, with the ability to store 50 images or 15-second videos on loop. Specifications: Sensor: GC0328 Screen: 3.5-inch IPS screen 480*320 Viewing angle: 35° Recording resolution: 480*320 Two-way intercom mode: video two-way intercom Audio information: built-in speaker, microphone Compression method: MJEPG Maximum resolution: 480*320 Night vision light source: infrared night vision Supported protocol: 2.4G private protocol Recording storage SD card: maximum support 256G (not include) Inside and outside power supply information: built-in polymer battery 3.7V 800mAh or Type C 5V/2A Standby intercom hang up sleep: 62.3uA Power supply: DC/5V/2A Waterproof level: IP44 Working temperature: -10~60℃ Storage temperature: 10%~90% Number of ringtones: 6