Brand: TRIOPO - Model: TR-981C - Color: Black - Material: Plastic - 2.0" LCD display screen - Guide Number: 54 meters (ISO 100 105mm) - Circuit design: IGBT ( insulated Gate Bipolar Transistor) - Horizontal rotation angle: 0~360 degree - Vertical rotation angle: 0~90 degree - Color temperature: 5500K - Working voltage: 6V - Suitable for Canon - Power: 4 x AA size Batteries ( Alkaline or Ni-MH are usable) - Flash Duration: 1/200s~1/20000s - Lighting times: 100~1500 times (with AA alkaline batteries) - Wireless triggering distance: 20~30m indoor 10~15m outdoor - Additional function: Overheat protection Power-saving mode PC sync - Packing List: - 1 x TR-981C speedlite - 1 x Mini stand - 1 x Flash diffuser - 1 x Protective bag - 1 x English / Chinese user manual