Meet the Hollyland Mars 400S PRO: a smart gadget that adds 1080p60 wireless video transmission to your gimbal, mirrorless or DSLR camera. With Hollyview app for iOS or Android, you can monitor video transmission in real-time via WiFi.
The transmitter has HDMI and SDI inputs. It has a low latency of 0.1s and a range of up to 400′. The 400S PRO has a compact design with an OLED display, integrated shoe adapter, and 1/4″-20 mounting thread. The transmitter can simultaneously send video to 4 apps or a receiver and two apps.[where to get it]