Lightweight Retro Camera Flash: Featuring leather and a matte silver metallic casing,it retains retro design lines while reducing weight to 130g，making it easy to slip into a camera bag compartment for hassle-free travel photography. GN12 Powerful Output (ISO 100): Offers 7 levels of power adjustment (1/1 to 1/64), color temperature 6000K ± 200K; 28 mm focal length (fixed value), catering to indoor and outdoor lighting needs, Optical Triggering with S1 & S2 Modes: Supports optical flash trigger functionality with S1 and S2 modes. (S1 Mode: the flash will fire synchronously when the main flash fires, the same effect as that by using of radio triggers. S2 Mode: the flash can also function as an optical S2 secondary flash to be suitable for TTL flash. This is useful when cameras have pre-flash function. With this function, the flash will ignore a single "preflash" from the main flash and will only fire in response to the second, actual flash from the main unit). Perfect for multi-flash setups, creative lighting, and off-camera flash photography. (Note: S1/S2 optical control is only available in M manual flash mode) A/M mode: discover more creative possibilities in M/manual mode and create your iconic style or discover pure pleasure when you take the first picture in life (note: the optical control s1/S2 is only available in manual M flash mode. ): With the largely compatible A/quick snap mode to calculate the correct exposure. [Note: powered by NI-MH battery or AAA alkaline battery] Compatibility with Major Devices: Single Contact hot shoe,compatible with popular mirrorless and DSLR cameras like Sony, Fuji, CanonOlympus. Its lightweight design Can also be used with Godox flash triggers. (Please note: the battery is not included) (only 130g) ensures easy portability. Guide Number: GN12(ISO100, in meters) Color Temperature: 6000K ± 200K Focal Length: 28mm(fixed value) Flash Power: full, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64 Aperture: F2-16 Distance: 0.5m, 0.7m, 1m, 1.5m, 2m, 3m, 4m Working Environment Temperature: -10℃ to 50℃ Power Supply: 2 * AAA batteries(not included) Item Size: 7.38 * 5.02 * 7.18cm/ 2.9 * 2 * 2.8in Item Weight: 130g/ 4.6oz