HF/LF external antenna for HID® OMNIKEY™ 5127. Dimensions: 37.1 x 27.6 x 0.7 mm. Tuned for "folded" orientation. 3mm gap from Reader Core to upper surface. DTK has sample spacer placing reader core and board in correct alignment. Many applications will require custom antenna tuning or designs to optimize performance in given environment. MOQ=20 units (in mults of 20).