Echostar remote number PVR721, Substitute JVC number TUPVR721DU, This remote is UHF and will transmit through walls. Will work follow receivers model: 1000, 2000, 2150, 2200. 2700, 2800, 3700, 3200, 3500, 3800, 3900, 3000, 4000, 301, 3100, 4700, 4900. 501, 508, 510, 522, 811, 322, 5100, 5800. This is a Genuine replacement remote for the PVR 721 Dish Network, Two Tuner Receiver.