At only 2 and one-quarter inches by three-quarters of an inch, the thumb-size DVR is a portable and convenient way to record video (with audio). It also will start to record whenever the decibel level is greater than 60 dB (normal conversation) in 2 minute cycles until the decibel level falls below 60 dB if set to voice activation mode. Covered under a 90 day warranty. The DVRTS uses a standard 8GB micro SD card (which is included) to record 720 x 480 AVI video at 30 FPS. It has several unique clip brackets that allow you to attach the camera practically anywhere: a magnetic bracket, a wall-mountable bracket and an alligator clip bracket. It comes with a built in lithium rechargeable battery that will record for up to 2 hours. **Please note that it is the responsibility of the customer to check all State, Local and Federal Laws governing the use of video Spy (hidden) cameras (with or without audio) before ordering and/or using hidden or covert video and/or audio surveillance equipment. In most states, hidden video surveillance is legal, as long as it is not done in an area where reasonable privacy is expected. These areas include, but are not limited to, bathrooms, bedrooms and dressing rooms. In most states video surveillance does not require the consent of parties involved. However, in some states, the use of audio recording or surveillance requires the consent of all parties involved. There are also various Federal and State Laws regulating the use, and possession, of some types of audio surveillance equipment. We recommend that you check all State, Local and Federal Laws regarding the use of video Spy (hidden) cameras with or without audio.