21-Tuner SWM LNB for Slimline Dishes (3D2LNB). Built-in SWM Multiswitch gives a single wire to feed multiple receivers. Will feed 21 tuners. The dish you choose depends on what satellites your locals are broadcast on. DIRECTV 21-Tuner SWM LNB for Slimline Dishes (3D2LNB). Simplify your DIRECTV system with this LNB that lets you use up to 21 DIRECTV receivers without an external multiswitch. This is just the front portion, this does not include the reflector or any other accessories. Easy installation onto any existing Slimline dish. Unlike the SL5, the SL3 receives satellites 99, 101 and 103. A Non-DVR Receiver = 1, a Non-Genie DVR = 2, a Genie DVR = 5. 8 x 4.9 x 4.3 inches. Receivers, Slimline satellite dishes. Product Dimensions: 4.9 inches x 8.0 inches x 4.3 inches. Weight: 2.12 lb. We reserve the right to cancel any order for any reason at any time. We are not responsible for undeliverable addresses. Your satisfaction is guaranteed! All of our items, unless otherwise stated, will only run on 120 volts. Please check to make sure your country complies with these specifications. We will work with you to resolve any problem you may have.