The PI-29 is a 29 volt power inserter designed for use on the DIRECTV SWM-8 and SWM-16 DIRECTV adapters. DIRECTV™ approved. SWM Port Output: 29V 1.5A (43.5W). The SWM-PI Power Inserter is designed for use on the SWM-8 and SWM-16 DIRECTV switch.
eBay