?Seamless Loop Recording?The 4K dash cam A800S overwrites the oldest videos with new content when the SD card is full, so the dash cam can achieve continues recording. You can change the video file length from 1,2,3min by settings. This cam supports microSD cards with a minimum capacity of 32GB and a read/write speed of U1(UHS-1) and above. ?In-app Control & Footage Sharing?Sharing is not a problem anymore with the dash cam 4K A800S, the 70mai App supports both iOS & Android systems, allowing you to view and download videos via Wi-Fi hotspot connection. In case of an accident, you can simply share the footage with your insurance provider for a more efficient claims process. Also, this function enables you to achieve continuous OTA updates by automatically fixing bugs and updating software. ?Built-in GPS & Route Tracking? Equipped with built-in GPS, 70mai 4K A800S monitors and displays real-time trip data including time, speed, and coordinates. Tracks the exact location of an accident if one should occur, crucial for roadside assistance and insurance claims (Kind Reminder: All customer data are only saved locally. 70mai will not breach your data or private information for business purposes or any other intentions.). ?ADAS System Featured Dash Cam?The Advanced Driving-Assistance System (ADAS) detects your surroundings and has real-time voice alerts to warn you of safety problems. The camera automatically detects lane markings and gives voice alerts when the car is drifting out of the lane. The dash cam also identifies the vehicle ahead and calculates the speed and distance of the car in front to prevent forward collisions while driving. ?24-Hour Parking Surveillance?Keep monitoring when you leave your car, the G-sensor automatically detects sudden shakes or collisions and starts recording, providing critical evidence for every important moment for 24h. In the event of an accident, you'll receive a notification to check the event footage in the 70mai app. 70mai Hardwire Kit UP02 (B08R5SBKZR, not included) is required for parking mode. ?Powerful Night Vision?4K dash cam A800S delivers excellent low-light performance that exceeds the traditional 3.3x. With 3D DNR (Dynamic Noise Reduction) technology and full 7-Glass/F1.8 aperture lens, the camera minimizes image noise. A dash cam that can be used with confidence at any time of the day or in certain weather conditions. ?Excellent 4K Ultra HD Dual Camera?70mai flagship camera 4K A800S with 70mai 1080P RC06 rear camera can achieve dual-vision recording which allows you to capture both the road ahead of you and behind, adding another pair of eyes on the road so you can drive without fear. Install the rear camera easily without connecting cables or plugging in ports.