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. Advance features such as modeling flash, TTL flash are not included. Comes with photoelectric trigger function, guarantees super recycle time and user-friendly operation. Adopts fixed knob and LCD panel to ensure easily operation. VILTROX JY - 680A Universal LCD Manual Flash Speedlite Light for Any Digital Camera with Standard Hot Shoe Mount Description 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. - Advance features such as modeling flash, TTL flash are not included. - Comes with photoelectric trigger function, guarantees super recycle time and user-friendly operation. - Adopts fixed knob and LCD panel to ensure easily operation. Specifications: Brand: VILTROX Suitable for camera mode: Standard hot shoe DSLR Slave mode: Slave / S1 / S2 Flash duration type: 1 / 1050 - 1 / 20000s Recycling time: 0.3 - 5s Guide number: GN33 ( ISO 100 / m ) Reception angle: 40 degree horizontal, 30 degree vertical Working mode: M / Multi Internal Power: 4 x AA alkaline batteries ( Ni-MH and lithium batteries are also usable )