RF loops from Xpresskit are an all new line of preloaded RF transponder rings that can be plugged into the DLPK module and allow it to operate as a combo door lock and transponder bypass solution. Preloaded RF transponder ring compatible with: Optimax series DLPK moduleIncludes (1) Pre-wired 2nd Gen Chrysler & GM PASSKEY3+ RFID Transponder and antenna ring.. Vehicle Electronics Accessories. Audio & Video Accessories. Preloaded RF transponder ring compatible with: Optimax series DLPK module Includes (1) Pre-wired 2nd Gen Chrysler & GM PASSKEY3+ RFID Transponder and antenna ring.. Height - 1.00. Model_Number - RFLCHGM. Depth - 6.00. Height - 1.00. Width - 5.00. Weight - 0.0438