Main Features:  - Reducing the shadow behind the body was taken to achieve more naturally photography effect. - With the locking ring, you could tighten it onto hot shoe safety. - Comes with photoelectric trigger function, guarantees super recycle time and user-friendly operation. - Adopts fixed knob and LCD panel to ensure easily operation. - In slave mode, supports 4 channels in 3 groups. - Enter into stand-by state if no operation after several minutes to save power. Specifications: Brand: VILTROX Suitable for camera mode: Nikon TTL system camera Slave mode: Slave / S1 / S2 Flash-ready indicator: Red pilot light Guide number: GN27 ( ISO 100 / m ) Adjustable vertical angle: 60 / 75 / 90 degree Recycling time: Approximate 0.1 - 4s Working mode: TTL / M / Multi Internal power: 2 x AA alkaline batteries ( Ni-MH and lithium batteries are also usable ) Note: The battery is not included. Model Number: JY - 610NII0.267Package weight: 0.305 kg Product Size(L x W x H): 10.10 x 6.40 x 4.80 cm / 3.98 x 2.52 x 1.89 inches Package Size(L x W x H): 11.00 x 8.00 x 5.80 cm / 4.33 x 3.15 x 2.28 inchesPackage Contents: 1 x JY - 610NII Flash Speedlite Light, 1 x Flash Stand, 3 x Soft light Box in Different Color, 1x User Manual in English and Chinese, 1 X Carrying Bag