Latching style 1x2 PM Fiber optic switch for 1550nm, 55dB return loss, 20dB ER, with 1 meter long, 900µm OD loose tube jacketed 8/125µm Panda PM fiber pigtails terminated with FC/APC connectors aligned & locked along the PM fiber's slow axes on all ends. LL: low loss <0.6dB (Not including connector losses); 1.0W input optical power. Open/close time typically about 10ms.