Factory Remanufactured Dish Network Hopper Whole Home DVR System with Built-in Sling Box (Dish Network Certified) The Hopper and Joey system, replaces existing equipment. In other words, older receivers hooked up, will need to be de-activated before Joey and Hopper can be activated. This may change in the future Has built in Sling adapter The Hopper includes SRS TruVolume technology, which prevents annoying volume fluctuations. Compatible with both Eastern Arc and Western Arc Dish 1000 To hook the Hopper up to three other receivers, you need a Solo Node For systems with two Hoppers and multiple Joeys get the Duo Node (each sold seperately)