The Hollyland Mars 400S Pro II is a powerful video transmission device that supports up to 1 transmitter connecting with 2 receivers.

It also allows for monitoring on up to 2 mobile devices while only 1 receiver is connected, and up to 4 mobile devices without the need for a receiver. The device features an OLED display screen, channel scan, three application scene modes, battery voltage display, and a 400ft transmission range with a low latency of 0.08 seconds. It offers both HDMI and SDI connection options, as well as a USB for firmware upgrades and an integrated cold shoe for quick installation. It supports DC power, USB Type-C power supply, and battery power supply for convenience.

Mars 400S Pro II boasts a greater range and lower latency compared to its predecessor, Mars 400S Pro. With a transmission range of up to 450ft (150m) and an ultra-low latency of just 70ms, it provides crisp clarity and stable signal transmission. The device also supports a data rate of 12 Mbps, delivering high-definition video transmission with clear and refined image quality. It is equipped with SDI and HDMI dual ports for unmatched compatibility with various equipment. Additionally, the device features a smart channel scan for steady shooting and allows for monitoring on up to 4 devices, making it a versatile and reliable choice for professional video transmission needs.