70mai Dash Cam need only with TF card that can start recording and storage for video. The original Class 10 TF card is the only authorized Card from 70mai. Custom will only recommend the original 70mai brand and Sandisk brand Class 10 TF card to buy. Usually most customers would like to buy the 32GB TF card for normal using. NOTE: The video is 1 min each time. Main Features: ● Accurate Voice Control (support English Voice Control ) ● AI Integrated ● 1080P Full HD ● Sony IMX307 High Sensitivity Image Sensor ● 130deg Field of View & Night Vision ● Built-in G-sensors for Auto Emergency Recording ● Mobile APP(Andriod 6.0 above /iOS) Control (Support English/Russian/Japanese/Korean) ● APP Name : 70mai (English) ● Free WIFI: IEEE 802.11 b/g/n 2.4GHz ● Video Replay and Download with 70mai free wifi ● Bulit-in G-sensor for auto emergency recording ● Free Wifi Connect support video replay and download ● 3.5M length micro charging Cable The reason is that the DVR will remove the earliest video automaticlly when your card is full. If the video is too long, maybe all the longest video will be removed. When you want to check some video especially some important time, you can not find anything there. Now you can turn to APP setting and choose 1min, 2mins or 3mins video. All the efforts are for a safe,comfortable and connected driving experience. VOICE CONTROL The camera has a voice control option (in English). The following messages are currently available: Take picture – take a picture Record video – record video ​ Specifications: Sensor SONY IMX307 1/2.9 INCH CMOS Shooting Pixel 2 MP Aperture F2.2 View Angle 130 degree Image Resolution 30 fps@1080P Video Format MP4 Processor MSC 8336D Capacity Standard Micro SD Card with the capacity of 16GB to64GB and speed at Class10 or above WIFi WiFi Wireless Transmit（Support IEEE802b/g/n） Audio Microphone Transmit Method WiFi Wireless Transmit Fix Approach Electrostatic Adhesion & 3M Adhesion Operating Temperature Suggest-20-60℃/-4℉-140℉ Battery Built-in 240Ah High Temperature Li-polymer Power Car Cigarette Lighter 5V/1.5A Power Port 5V DC Micro-USB Cable Length 3.5M FAQ 1.What car models does 70MAI smart dash cam suit for? As the 70MAi smart dash cam provide the electrostatic adhension installation, it is suitable for 95 % cars modelsin the market.But some models of Volvo can't use the power normally due to the difference in the interface of the original car cigarette lighter.Please buy it with caution. 2.How is the product packaged? What will be shipped about this product? The product is originally packaged in a cardboard box, which can guarantee that there will be no damage during transportation.it includes one camera, one car charger, One 3.5m charger cable,one static electricity sticker