Three-channel dash cam: front, rear, and interior (infrared). The front camera offers up to 1080p FHD resolution with a 134-degree diagonal angle, while the interior camera provides up to 720p HD resolution with infrared and a 124-degree diagonal angle, and the rear camera offers up to 1080p FHD resolution with a 124-degree diagonal angle. The F2.0 aperture provides a perfect night image for the front camera, while the F2.2 aperture with 3DDNR technology provides a good infrared night image for the interior camera. The built-in GPS module supports speed display and track tracking. The device has a built-in microphone and speaker for audio input and output. The device supports a built-in Wi-Fi module and Wi-Fi hotspot functionality. The device supports a built-in G-sensor, which supports video recording even in case of an accident or strong vibration. (Built-in video recording can be set not to be overwritten by existing data) TF memory card for video recording, from 32GB to 256GB Phone App: Live view, playback recordings, and adjust settings. Support for Advanced Driver-Assistance Systems (ADAS): Driving Time Alert V300 is equipped with built-in 4G technology, V300[N4G] does not support 4G Display vehicle speed Track tracking with the ability to review past trips Microphone + Speaker Supports audio recording and playback Supports Wi-Fi connection Supports Wi-Fi AP mode (direct connection) Driving Time Reminder