NEEWER TT660 LION Battery Flash Light For Canon/Nikon

M Mode Press Mode Selection Button to enter M mode. In this mode, you can set the flash onto your camera's hotshoe or trigger to fire flashes. During shooting, adjust the power output and press the camera shutter, then the flash will fire a flash under the camera synchronous signal. S1 Mode Press Mode Selection Button to enter S1 mode. In this mode, the flash can function as a slave flash for creating multiple lighting effects. It is respectively applicable to manual flash environment. In S1 mode, the flash will fire synchronously when the master flash fires, the same effect as that by the use of radio triggers. S2 Mode Press Mode Selection Button to enter S2 mode. In this mode, the flash can function as a slave flash for creating multiple lighting effects. It is respectively applicable to manual flash environment. In S2 mode, the flash will fire synchronously when the master flash fires the second flash.Note: In M mode, the slave triggering function does not work. Sync Trigger Function The flash can synchronize with the camera by using a PC sync cord to connect the camera and the flash's PC Sync Socket together. Manual Zoom Function The zoom-head position is manually adjusted within the range of 24mm, 28mm, 35mm, 50mm, 70mm, 80mm, and 105mm. By pressing ZOOM, you can select a suitable focal length. Power-Saving Function In M mode, the flash will enter standby status after about 30 minutes' idle operation. To wake it up, press any button. In slave triggering mode S1 or S2, the flash will enter standby status after 60 minutes' idle operation. To wake it up, press any button. Package Contents: 1 x TT660 flash speedlite 1 x Mini stand 1 x Protector bag