Tips: This mirror built in battery. but while you disconnect car charger, it will turn off screen, but mirror still working for record video. and screen will not turn on except you re-connect with car charger. 1. The leader of smart car dvr. 2. All products have been passed strict quality test before shipment, make sure high quality. 3. Return for any reason within 15 days. 4. If the product has a problem within 365 DAY after confirming the receipt, we will replace the new machine directly for you,But Please contact us first to resolve the after-sales problem. This warranty does not apply to damage caused by accident, abuse, misuse, or modification of the product. Specification **installation Type:Rearview Mirror, suitable for all vehicles with mirror- **Screen(Display) Size:10.0 Inch Touch Screen- **Chipset(Processor/CPU): SL8541E- **RAM:RAM: 2G; ROM: 16G- **System:Android 8.1- **Camera Lens: Front + Rear; 6 Glass + 4 Glass; 170 Degree Angle + 120 Degree Angle; F2.2 Aperture + F2.2 Aperture- **Video Resolution:Front: 1280*720P@25FPS; Rear: 1920*1080P@30FPS- **Photo Resolution:8M- ** Video Code:H.264- **GPS Navigation:Support- **SIM Network: Support(4G/LTE:FDD,2100(B1)/1800(B3) GSM:900(B8)/1800(B3)- **WIFI:Support- **Bluetooth:Support- **Battery: Without- **Languages:Arabic;Czech;Dutch;English;French;German;Italian;Japanese;Korean;LatvianLithuanian;Polish;Romanian;Russian;Slovak;Spanish;Vietnamese- **Basic Features: G-Sensor, Cycle Recording, Motion Detection, 24 Hours Parking Monitor, Time&Data Display, Wide Dynamic Range - **Memory Card:Micro SD Card, class 10 and 8GB to 64GB (Not included). **Package Include: 1 x Mirror DVR 1 x Rear Camera (with 5.7 meters length) 1 x power cable 1 x GPS antenna 2 x Rubber Band 1 x English Manual