HIGH QUALITY 4K DUAL CAM VIDEO: All VIOFO car dash cam front and rear sets are designed to provide the best quality video recording and playback. Both in car cameras use a Sony IMX317 sensors & high quality 130 wide angle lenses to ensure footage is recorded 4K Ultra HD with 3840 * 2160 Resolution (front camera) & 1920 * 1080P (rear camera). Built in microphone & motion detection. Premium quality detailed video. COMPACT & EASY TO FIT: Measuring just Front 84mm(L)55mm(W)40mm(H) & Rear 53mm(L) x 31mm(W) x 50mm(H),this VIOFO Pro Duo 4K car dash cam set is discreet but high quality. Securely attached directly to your windows & out of your direct eye-line. All VIOFO dash cameras are easy to attach to your vehicles front or rear windscreens with the integrated sticky pad. GPS TRACKING INCLUDED: The Pro Duo 4K dash camera uses secure GPS to store your real-time speed, G forces, the time & your location. This data is displayed in the video file when played back which can be vital for Insurance claims or Police evidence. Combined with other useful features including auto event detection, auto start/ stop, parking mode, time lapse recording and more. SUPERIOR NIGHT VISION: 50% of UK road deaths happen at night. With this in mind the VIOFO Pro Duo 4K in car dashcam has been developed to ensure it provides the clearest possible picture at night. This is thanks to our Sony 317IMX sensors & WDR technology which can quickly adjust to bright & dark areas which is vital when driving with other cars headlights at night. GET THE APP: With built in dual band (2.4GHz & 5GHz) Wi-Fi wireless technology theres no need to remove the camera from your vehicle to download your files. Simply add the app to your smartphone or tablet and you can download your journeys wirelessly. Using the app you can easily preview or download stored video or even control the front and rear dash camera.