BNeewer® flashes ReviewbP PP Neewer® flashes PPowerful Flash with High Guide No.58190ft (at 180mm focal length, ISO 100 in metersfeet); Flash Coverage: 18-180mm.PFlash mode: TTLMMULTIS1S2SLAVEFEBPQuick response: Full output recycle time only 2.9 seconds.PShutter Sync mode: rear-curtain, high speed sync (HSSFP), Max 18000s sync speed.PLarge size TFT color display.