The Mark II also has auto-rotation so it stays upright even when turned for vertical framing. It features the "MY TTL" mode for adjustable default level, and a manual motor zoom of 24-105mm. It is designed with clip-on capabilities, built-in wide-angle diffuser and catch-light reflector for added versatility. It's powered by four (4) LR6 rechargeable batteries, (Lithium, NiMH or Oxyride--not included), and when it is operated with a Nissin Power Pack Pro 300 (not included), users have 300 full-power flashes. It boasts a recycling time of about 3.5 seconds.