Hollyland MARS-400S (MARS400S) Low Latency Transmitter and Receiver - SDI & HDMI compatible, up to 400ft range. The Hollyland MARS 400S Low Latency Transmitter and Receiver set A Multiple Platforms Wireless Monitoring System OLED Display Screen Allows you to check the status of all devices and control the system with displayed information on the screen. iQS & Android APP Monitoring Support up to 4 app connections while the transmitter is connected to 1 or no receiver. Channel Scan Scan current environment on the receiver to find out available channels and avoid the channels with interference. Three Application Scene Modes Prioritise your video shooting over video quality, or low latency, or the balance between the both when there is interference. HDMI + SDI Interfaces Provide HDMI and SDI devices connection options. Industrial Metal Case Equipped with a stable, reliable and durable metal case to avoid light external damage, and easily cools the system down.