Note: This flash NOT compatible with Sony ZV-1F. Check Compatibility before Purchasing: the Lux Junior only compatible with the majority of camera with Single-Contact Hotshoe, please confirm if your camera has a Single-Contact Hotshoe before purchasing, otherwise the product will be incompatible or unusable | Note: This flash NOT compatible with Canon EOS Rebel SL3/250D，Rebel T7/1500D 2000D，Rebel T100/3000D 4000D 200DII. This flash NOT compatible with Sony ZV-1F. | Troubleshooting for failure to flash: 1. When using the flash for the first time, wait for the flash recycle indicator to turn green, it means recycle complete. If it the indicator remains red or white, please replace the battery with a new one or a fully charged one. 2. If the flash can't work, try going into the camera's menu and changing the flash setting to to "manual mode / M" mode | Troubleshooting for not working as expected: 1. Shutter Speed setting: this flash doesn't has TTL function or High-speed sync, we recommend a shutter speed below 1/200, otherwise, the photos may show black edges, white edges issues. 2. Sensitivity setting: we recommend setting the ISO sensitivity to 100, and then increasing it based on the actual brightness or darkness. 3. Aperture setting: we recommend setting the aperture to 2.8, and then increasing it based on the actual brightness or darkness. | Size and Weight: the Lux Junior only size of 2.9 x 2.8 x 2 inches and 130g net weight. Product Material: mainly plastic. Please check if this is the size you want before you purchase. The Lux Junior powered by two AAA batteries (which are not included) | Note: the Storage bag and Triggering Cable and Instructions are at the bottom of the box, you need to take out the black packaging foam to see them | Back to the 1980s: Compatible to all camera types and embrace diversified aesthetics, it lets your creatives flow with no obstacle. However time changes and tech upgrades, Lux Junior will bring you the pure happiness and beauty of the 1980s | Retro In Style: With a vintage style speak for itself, the Lux Junior can be part of your everyday outfit. When you take pictures on the street, there is no longer the embarrassment of using a giant flash on you camera | Easy to Use: With the widely compatible "A" mode to help you calculate the proper exposure, you can immerse into the creative pleasure either with digital cameras or film cameras. With "M" mode, explore more creative possibilities, create your iconic style, or rediscover the pure pleasure when you take the first picture in life | Basic Function: The Lux Junior has seven power levels from 1/1 (full power) to 1/64 (lowest power). Color temperature of 6000K±200K. S1/S2 optical control is available in M manual flash mode