The Metal Phone Holder with Cold Shoe Mount is compatible with cameras that have a cold shoe mount, as it is mounted on the hot shoe. However, the Sony a6700 does not have a cold shoe, but a multi-interface shoe that is not compatible with standard cold shoe accessories. Therefore, this phone holder is not directly compatible with the Sony a6700.
For the Sony a6700, SmallRig offers special cage solutions and accessories that are customised for the camera, such as the SmallRig Cage Kit for Sony Alpha 6700 (manufacturer no. 4336), which integrates cold shoe mounts and can therefore accommodate compatible accessories. The Metal Phone Holder with Cold Shoe Mount 4382, on the other hand, is designed for gimbals and cameras with a standard cold shoe, e.g. DJI RS 3, RS 4 etc..
To summarise: The Metal Phone Holder with Cold Shoe Mount is not directly compatible with the Sony a6700, as this camera does not have a standard cold shoe. For the Sony a6700, we recommend the use of specially developed cage accessories from SmallRig.