The YN-460 is a flash from the Chinese company Yongnuo that is primarily designed for off-camera use in a multi-light setup. It was first produced in 2009 as an excellent option for dedicated Nikon flashes to be used by professionals and hobbyists alike. The Yongnuo has a head that tilts and swivels. The tilt gives you a full 90-degree range while the swivel covers negative 180 to positive 90 degrees. This flash unit weighs a mere 8.8 ounces, making it easy to carry for offsite shoots. The listed guide number is 33, which is a very usable output, and the unit has a built-in optical wireless trigger and is compatible with most radio remote triggers. The built-in slave has two modes controlled by a small button on the back of the unit. The first mode is a normal "dumb" slave that fires in sync when it sees a flash. The second mode ignores any preflash and only fires when it sees the main light from other flashes in your setup. That is particularly important when using the YN460 with a speedlite that uses a preflash or an auto-focus assist beam. The built-in optical trigger is located right on the front of the Yongnuo 460 under a protective red cover resembling an autofocus assist beam. It is located low enough so that modifiers, such as a mini softbox, do not block it, and it is sensitive enough to fire reliably even in a fully lit room. The 5600k output goes from full power down to 1/64th power in full stop increments. The higher powers are sufficient for the unit to act as a primary source or for use with a diffuser, and the lower power settings make it perfect as a fill light. The shoe mount slides easily onto cameras and locks firmly in place. The shoe mount is constructed from metal on all of the units made starting in 2011, and they are tough enough to handle any outdoor shooting conditions. The controls are simple and utilitarian with no fancy switches or LCD panels; these uncomplicated controls are useful when using multiple lighting setups. This flash unit is designed primarily for using off-camera in multi-speedlite photography setups. However, if you do decide to use the YN-460 on camera, you find that the flash triggers on almost any brand of camera, including Nikon and Canon, and recycles quickly, typically within about five seconds. The triggering voltages are below 3.5 volts, so you do not harm the delicate electronics in your camera. On camera, the flash operates in manual mode, not TTL or ETTL, and it covers about an 18-mm lens on an APS-c size sensor. The Yongnuo YN460 takes four AA batteries and uses either alkaline or rechargeable ones. The flash duration is approximately 1/800th, which is short enough to easily freeze action.