The Hollyland Mars 400S PRO II is a next-gen wireless video transmission system delivering ultra-low 70ms latency, a 450ft LOS range, and support for both SDI and HDMI interfaces. Ideal for filmmakers, live production teams, and broadcast applications, this versatile system supports up to two receivers or four app-based monitors simultaneously. Features include 12Mbps high-quality data rate, smart channel scanning, integrated cold shoe mounting, and whisper-quiet fan modes for flexible on-set use.