Note: This flash NOT compatible with Sony ZV-1F, A9III, A99, A77, A350. This flash NOT compatible with Canon EOS Rebel SL3, 250D, T7, 1500D, 2000D, T100, 3000D, 4000D, 200DII. This flash NOT compatible with Fujifilm X-A3, X100F, X100T 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 one or a fully charged one 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. Aperture setting: we recommend setting the aperture to 2.8, and then increasing it based on the actual brightness or darkness. Long-lasting Lithium Battery: Built-in a 3.8V/470mAh lithium battery, the iM20 offers stable performance and can deliver up to 440 full-power flashes, with a recycle time of about 3 seconds. The iM20 comes with a USB C charging port, enabling rapid recharging and keeping you prepared for shooting Lightweight and Compact: the iM20 only size of 1.54 x 1.5 x 1.16 inches and 31g weight, iM20 fits in your pocket or handbag without taking up much space, making it easy to carry around for street photography or travel Brand:godox Compatible Mountings:for Sony zve10,zv1,a7iii/Ricoh gr3,gr3x/Fujifilm f1, NOT for ZV-1F Camera Flash:Hotshoe Flash Sync Speed:1/250s The product appearance and printed words may vary depending on the