TR series: High performance, high compatibility, high-power flash output.Increase the external power outlet: TR series adds an external power outlet; call back the higher rate to meet your needs. Quick call back: Full output only 2.9 seconds recycle time, do the new battery can also call back to obtain a rapid rate, only 4-5 seconds. Support high-speed continuous : 1/16 and below the brightness, TR series to support high-speed continuous 12SEPS. Power-saving mode: When the flash without any action on the backlight turned off after 20 seconds, 60 seconds when the flash does not work, CPU automatically goes to sleep does not work more than 30 minutes, CPU automatically shut down. High- output: From 1/128 to 1/1, 8 stalls to lose, each stall have two fine-tuning compensation,Support second-curtain sync: Uses a slow shutter for making smear subject, the flash be off the moment the shutter flash spill, this is the rear-curtain sync function Guide number:35 meters (ISO 100, 35mm) Circuit design:Insulated Gate Bipolar Transistor (IGBT) Flash mode:M / (repeating) / MA(semi-automatic) Zoom range:35mm Vertical rotation angle:0 to 90 degrees Horizontal rotation angle:0 to 360 degrees Flash control:8 grade high-speed control(1/128-1/1) Recycle time:approximately 3s Lighting time:100-1500 times (using AA alkaline cell) Color temperature:5500K Flash time:1/200s-1/20000s Wireless triggering distance:20-30m indoor, 10-15m outdoor Additional function:PC synchronous, sniff mode, over temperature protection Color: As Shown Material: ABS Package Contents: 1 x AF970 Speedlight Speedlite Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.