The SB-3710 is a 1x4 Digital Analog Audio Distribution Amplifier is designed to work as a splitter for Digital/Analog Audio applications. Capable of splitting a Digital/Analog Audio signal from (1) source to (4) devices with compatible inputs. A built in amplifier will boost the signal to the needed level, to prevent signal loss and Audio Distortion. The 1x4 Distribution Amplifier works with satellite and cable set-top boxes, DVD players, D-VHS players and all other equipment that is equipped with proper audio connections. This product has a 30 day warranty.