Check the listing for details. Multiplex Tech Channel Innovations Broadband RF Amplifier Model#DA-500. Condition: Open box. Listed at 53.50 USD. Multiplex Technology RF AmplifierModel#DA-500 FEATURES: Maximum Output: per channel @ all frequencies: 6 channels operating5 48 dBmV 12 Channels operating 45 dBmV24 Channels operations 42 dBmV 48 Channels operations: 39 dBmV Power Supply: Model#350-037, includedPower Input: 105v - 120vac, 60 hz Dimensions: 6-3/8" long x 2-3'4" wide x 1" thickUnit Weight: 1 lb or less Description taken from inside the instruction manual: "ChannelPlus amplifiers are high power, low noise, low distortion distribution amplifiers with flat response from 40 MHz to 1000 MHz. They are used for all cable and off-air RF applications: VHF (high and low), FM, Midband, Superband, Hyperband, Ultraband and UHF. The low distortion push-pull circuit design incorporates surface mount and strip line technology for high reliability and small size." "The DA-500 amplifier can be used for residential cable systems or as an antenna or cable feed preamplifier. In a cable system in the home, use a DA-500 with a 4-way splitter for up to 100 ft. of RG6 coax cable. Use a DA-500 as a preamplifier for an antenna or cable feed at the input of a ChannelPlus Modulator."