RF Modulator, RCA to Coax Adapter, AV Video to Coaxial Converter for Old TV

Specifications:TV Standard Format: NTSCOutput Frequency Range: 61.25MHz (CH3) - 67.25MHz (CH4)Input Ports: 1 x RCA (Composite Video + L/R Audio), 1 x F-Type Coax Antenna In (Pass-through only)Output Port: 1 x F-Type Coax RF OutVideo Input Impedance: 75 OhmsAudio System: Mono (M=4.5MHz)Power Supply: DC 5V (USB)Size: 4.0x2.8x1.2 inPackage Contents:1 x RCA to RF Modulator1 x USB Power Cable1 x User ManualIMPORTANT (Please Read Before Purchase):Unidirectional Only: This device ONLY converts from RCA (Input) to Coaxial RF (Output). It CANNOT work in reverse (it will not convert a coaxial cable signal into RCA).Pass-Through Limitation: The "ANT IN" coax port is simply a pass-through for existing antenna lines. It does not convert digital antenna/satellite signals into CH3/CH4.Analog Quality Expectation: This RF modulator converts video into a 480i analog NTSC signal with mono sound. It is specifically designed for CRT TVs. If connected to a large, modern 4K/HD digital TV, the picture will appear grainy and less sharp due to the nature of analog signals.

• Revive Older TVs: Breathe new life into older CRT TVs or monitors that lack modern AV/RCA inputs; Seamlessly convert analog composite (CVBS) signals into RF coaxial signals, letting you enjoy media on vintage screens without expensive upgrades
• Wide Compatibility: Easily connects VCR Blue-ray DVD player PC CCTV DVR camcorder TV tuner satellite set-top cable box retro gaming consoles (fits Nintendo Switch XBox PS2 PS3 WII NS), and more devices to your older TVs, perfect for home entertainment and security
• CH3 / CH4 Switch: VHF channel switch allows you to easily toggle between Channel 3 and Channel 4 with one click to ensure your converted video signal does not interfere with your local CATV or existing broadcast frequencies; supports NTSC
• Antenna Pass-Through: One F-Type Coax input, allowing you to pass through existing antenna or cable signals to your TV without removing the modulator; the amplified RF output supports ultra-long-distance transmission, ideal for sharing CCTV feeds to TVs in different rooms
• Plug & Play: No drivers, software or complicated setups required; simply plug in the included USB power cable, connect your RCA source, and run a coaxial cable to your TV; IMPORTANT: This is a 1-way AV to RF converter; it CANNOT work in reverse (does not convert Coax to AV).