Features The flash unit has 8 steps of power output control and three modes, satisfy different photography environment. Has a fast recycle time of approx 0.1-5 seconds; 1/300s~1/20000s flash duration, giving you great exposure. With a pull out reflector/diffuser, soft box, and mini stand, convenient for your use; low power consumption and overheating protection. Suitable for DSLR Camera with standard hot shoe, nice replacement for Nikon, Canon, Pentax, Olympus, and so on. Comes with trigger, no need to fix the flash on the camera top any more, more flexible to use, shooting wonderful pictures with stereo feeling. With PC Sync socket, the speedlite and camera can trigger synchronously; and the AT-16 trigger transmitter has 16 channels and good interference proof performance. Specifications Color: Black Material: Plastic ---Flash Guide Number: 33 ( ISO@100 ) Flash Mode: M, S1, S2 Vertical Rotation Angle: 0~90 degrees Horizontal Rotation Angle: 0~270 degrees Power: 4 * AA size batteries ( Alkaline or Ni-MH are usable ) (Not included) Lighting Times: 100-1500 times ( AA alkaline batteries used )(Not included) Recycle Time: approx 0.5-5s ( AA alkaline batteries used )(Not included) Light Quantity Output Control: with 1/8 - stop increment Color Temperature: 5600K+200K Flash Duration: 1/300s~1/20000s Item Size: Approx. 19 * 7.7 * 5.5cm / 7.5 * 3.0 * 2.0in Item Weight: 306g / 10.8oz ---Trigger Transmitter Battery Supply: 12V 23A battery (not included) Trigger Mode: Wireless control Working Distance: 15m (indoor) Note Batteries are not included. Package List 1 * TT520 Flash Speedlite (without battery) 1 * Trigger Transmitter