Precise Adjustment: Accurate 6 levels of aperture adjustment(1/1-1/32), +/- 0.3 aperture fine-tuning, more accurate exposure control.Standard Flash Tube Color Temperature: Adopts professional light tube, and color temperature is maintained at 5500k±200k, which is not affected by power output.Touch function Press key: Touch button switch, with LED display showing output power, more convenient to control the flash light.Fast Recycle Time: 0.1-1s fast recycle time, no pressure to quick continuous shooting, improving your work efficiency effectively.Ultra-strong Heat Dissipation System: Built-in cooling fan and multi-row cooling holes for fast cooling, safe usage and long service life.__________________________________________________Package include:Studio flash TB-400C (2pcs)Light stand LS-280B (2pcs)NE softbox 60x90cm (2pcs)Transmitter AC-2.4B (1pcs)__________________________________________________Package size:100x39x21.5cmPackage weight:14.5KG