DISCREET DESIGN: This Dash cam with signature low-profile design allows the camera to be a well-hidden witness to the road ahead, providing sufficient evidence for collisions etc.(Not include Snap Button) CRYSTAL-CLEAR RECORDINGS: Advanced OV2735 sensor, wide-angle lense, and Wide Dynamic Range technology capture 4 lanes of traffic in Full HD 1080P, even at night still provide you high-definition Video Emergency Recording: Seamless Loop Recording overwrites the oldest footage with the newest upon filling a card to capacity. Variable sensitivity G-sensor auto detects a sudden shake/collision and emergency locks the footage to "Event File" to prevent that video from an overwrite which will become your important evidence.An extra hard wire kit is needed(not included Asin:B074KDXCX1 ). Extreme Safe & Stable: Powered by the included dual-port USB car charger and internal super capacitor(Designed to continue operation in -22℉-176℉). The supercapacitor has greater heat & cold endurance and longer lifetime than standard battery technology Easy Video Management: Connect built-in Wi-Fi and open the DDPAI app by smart phone to preview,playback and download video, or share incredible HD video. No need download by the computer.