Godox MF12 Specs Flash Guide Number 16′ / 4.9 m Flash Duration 1/1200 to 1/34000 Second Recycle Time Approx. 0.01 to 1.7 Seconds Exposure Control TTL via Separate Commander, Manual Power Range 1/1 to 1/128 Secondary Illumination Modeling Light Wireless Wireless Operation Radio (TTL/Manual) Up to 98.4′ / 30 m (Slave) Wireless Channels 32 Wireless Groups 5 Power Internal Power 1 x Built-In Rechargeable (500 Full-Power Flashes) External Power Pack Compatible No General Mount Lens Mount Lens Compatibility 49mm/52mm/55mm/58mm/62mm/67mm/72mm/77mm Filter Threads Display None Off-Camera Terminal None Dimensions (W x H x D) 3.2 x 3.0 x 2.5″ / 81.0 x 76.5 x 64.3 mm Weight 5.1 oz / 144 g Packaging Info Package Weight 0.915 lb Box Dimensions (LxWxH) 4.9 x 4.8 x 4.1″