This 850nm IR illuminator is compatible with all Wraith models - Wraith HD 4-32x50 (SM18011), Wraith HD 2-16x28 (SM18021), Wraith 4K Max (SM18030) and Wraith 4K Mini (SM18041) – and can also be used in conjunction with other night vision and digital night vision products. The Wraith IR illuminator enables night vision devices to see further distances at night with no ambient light. This is the IR illuminator only and does not include a picatinny mount, which is sold separately.