Compact passive router/switcher for AV setups that need simple manual routing without power. Allows selection among 24 input sources to a single output — typically composite video + stereo audio signals routed through standard BNC video and RCA audio connectors (video 1 Vpp/75 Ω on BNC, stereo audio on RCA) for unbalanced AV switching. Passive design means no power required and good basic signal routing for analog SD AV systems. 

Functions (brief)

• 24×1 routing: Manual selection of any one of 24 AV inputs to one output. 
• Input types: Typically composite video (BNC) + stereo audio (RCA) inputs. 
• Output: Single composite video and stereo audio. 
• Passive switcher: Unpowered, mechanical/manual switching. 

Great for analog AV routing in broadcast, production, or legacy video setups where simple 24-source selection is needed.