Everything you love about Nintendo 3DS-only bigger! What if you don't want 3D graphics? The Nintendo 3DS allows you to adjust the intensity of the 3D effects and turn them off completely with the 3D depth slider should you need to give your eyes a break, or if you have children ages 6 and under whom play for extended sessions. The Nintendo 3DS gives you total control over your games from the built in Gyro sensor to the Circle Pad to the always trusted D pad and stylus.  The gyro sensor allows you to use the device as the controller.  Tilt the 3DS and watch the compatible game react.  For the active gamer the 3DS offers the Activity log which rewards you for carrying the 3DS with you as you walk with in-game coins!  Additionally StreetPass™ allows you to communicate and share your Mii and game information with random people you meet throughout the day.  Pictures can be taken in 3D using the 3DS and its three built-in cameras.  Your pictures will come to life in crystal clear 3D.. Nintendo 3DS includes two screens. The bottom touch screen makes use of a telescoping stylus that is stored in the unit itself. The top screen displays 3D visuals to the naked eye. Looking at the screen is like peering through a window into a world where characters and objects have true depth. The system also has a 3D Depth Slider that lets players select the level of 3D they enjoy the most. The 3D effect can be ratcheted up to the highest level, scaled back to a more moderate setting or even turned off completely, depending on the preference of the user. In addition to the familiar + Control Pad and button controls found on previous Nintendo hand-helds, Nintendo 3DS now also includes a Circle Pad, which provides a full 360 degrees of direction, giving it the freedom and precision needed to play games in 3D worlds. It brings the same degree of responsiveness that gamers enjoyed when Nintendo introduced an analog control stick to navigate Mario™ through Super Mario 64™ on the Nintendo 64™ system. Sound: Stereo speakers positioned to the left and right of the top screen (supports virtual surround sound). Stylus: Telescoping stylus (approximately 3.94 inches when fully extended). Electric Power: AC adaptor (WAP-002 [USA]). Nintendo 3DS Battery Pack (lithium ion battery) [CTR-003]. Charge Time: About 3.5 hours Battery Duration: When playing Nintendo 3DS software about 3-5 hours. When playing Nintendo DS software about 5-8 hours. Battery duration differs depending on the brightness setting of the screen. The information regarding battery duration is a rough standard. It can be shorter depending on what functions of the Nintendo 3DS system are used. Game Card: Nintendo 3DS Game Card. The size is approximately the same as Nintendo DS Game Card.