This car key sized camera may look innocence, but only you will know that hidden inside the remote is a 30 FPS 640x480 DVR and 1280x960 (1.2MP) camera. The simple design makes it easy to operate and easy to transport. This model comes with 2 GB of flash memory built in (can not be upgraded). The camera records in AVI format which means you can use any program that supports the AVI format to view you video. The remote comes with a built in rechargeable lithium (280mhA 3.7v ) battery with a duration of 1.5 hours per charge. The battery can be recharged via the USB port or with the included AC adapter. The remote minus the keychain (keychain adds 2 inches in length) is only 2 inches long by 1 and a quarter inches. Kit includes the key remote camera, USB cord, AC adapter.