... 8. Built-in 1350mah lithium battery, record video continuous for 4 hours. 9. Built-in microphone 10.Auto start ... port: high-speed USB 2.0 connect to computer for upgrade and backup 21.SD/TF card socket: support ... 22.Built-in microphone 23.Built-in 4 IR LED for nightvision 24.Control buttons: Mode,Down,Up,OK, ... ,Temperature10%-80%,-5°C-45°CPhotos Full HD Car DVR with G-Sensor H.264 Car Camera Recorder