1. Cannot use SD card: when used for the first time, need to insert the SD card format, and then use;SD card you need to use the compatibility of good product.
2. About the video images: this product is normal pixel recorder, it cannot achieve the result of HD, please note.
3. About the battery: Battery capacity of this product is very small, it is suitable for inserting used car charger. If it needs to be used alone, it can be used for 5 to 10 minutes.
4. language: this product has about 10 languages: English, German, Russian, French, Japanese, Korean, etc., Please adjust the language yourself.