Hollyland's Wireless Tally System gives multi-camera productions a reliable way to show talent and camera operators which camera is live, without running tally cable across a studio or venue. It's built to work with a range of existing video switchers and to keep a stable signal even in RF-congested environments. Multi-Port Switcher Compatibility: Offers DB25, RJ45, and USB-C connections to support a variety of video switchers. Adaptive Frequency Hopping: Detects interference in busy RF environments and hops to a clearer channel automatically. 2600ft (800m) Transmission Range: Line-of-sight range suited to large studios, arenas, or outdoor venues. Up to 16 Tally Channels: DB25 supports up to 12 dual-color channels while RJ45 supports up to 16, scaling to productions of different sizes.