e2000mFeatures Build To Last: E2000LFP utilizes premium LiFePO4(lithium iron phosphate) batteries which can retain 80% of its orinal capacity at 3500E2000 to E2000 (LSH to LSH) Singlemode 9125µm OS2 Duplex Fiber Patch Cable (E2000-E2000, APC Polish, 2.0mm, LSZH, Yellow) Fiber optic patch cable is also known as fiber