This nanny cam is built-in 10000mAh rechargeable battery which can record up to 20 hours of video after fully charge. Large-capacity battery can support long-term work, video at any time and won't miss wonderful moments.No audio recording,Gravity Sensor - During the working process, flip up and down the camera 180°, the camera will automatically switch to the normal screen. That means you can get upright videos even if you put the camera casually.No audio recording,Motion detection - This is the only one NO wifi power bank camera which has motion detection function, automatically save videos when camera detect motion. And will save a video document every 5 mins. Avoid taking unnecessary shots. NOTE:This camera does not record sound.,Easy to use - No wifi needed. Just insert a TF-card(MAX support 128G,not include),turn the mode switch to the “L” position for continuous mode, “M” position for motion detection mode (no lights will flash during recording).No audio,Full HD 1080p videos, help you to monitor what happened in where you want covert, NO photos function. The night vision function will be automatically turned on according to the intensity of the sensed light. We provide 12 months refund or replacement and lifetime technical support. If you have any questions with the product, please feel free to contact with us.