The SuperK SELECT is a tunable wavelength filter based on Acousto-optic Tunable Filter technology (AOTF). AOTFs tune over one octave of optical frequency and the SuperK SELECT allows the integration of two AOTF crystals to provide wide spectral coverage. Together with a range of unique features, the SuperK SELECT provides an easy to use, flexible and accurate tuning accessory to access any wavelength in the SuperK spectrum. The SuperK SELECT can be equipped with up to two Acousto-Optic Tunable Filters (AOTFs) which are powered by an RF driver, integrated within the SuperK EXTREME.. The SuperKontrol software automatically recognizes and initializes the integrated AOTF(s) within SuperK SELECT.