DIRECTV Dual SWM-E2 Expander & 24v Power supply for Two DIRECTV SWM Switches (SWM-E2) Connect two SWM8 switches for up to 16 or 32 channels out. Mounts as one unit, no additional chassis required. Requires 24V power supply (Included). Provides 32 independent channels for supporting up to 16 DIRECTV satellite tuners