ViewHD Dual-band HDMI IR Extender | VHD-IRHS Support HDMI cabel length up to 25M between teh TX and RX adapters, depends on cable quality Adopts dual-band (30KHz - 60KHz) IR receiver and transmitter for best compatibility Support ARC, Plug & Play Power Free; No Power Adapter Necessary (Uses power over HDMI from HDMI source unit) ViewHD One Year Warranty