An online virtual tester. You can click on it and play around:
https://xd.adobe.com/view/a2541f98-d93e-40d3-bc26-48f332f93304-f707/

FiberMASTER PON OTDR (1310/1550/1625) with SCAPC connectors, Inspection port, Power meter

Kit Contents

- FiberMASTER PON OTDR (1310/1550/1625) with SC-APC connectors, Inspection port, Power meter, Power Adapter (1),
- USB Cable (1),
- Stylus (2),
- Carry Case (1),
- Hang. Strap (1),
- Cleaning Pen 2.5mm (1),
- SM 2m APC Cable SC-SC, Power Meter Connectors (LC,SC,FC,ST,1.25mm UNIV, 2.5mm UNIV), Quick Ref. Guide (1)


https://www.youtube.com/watch?v=rM4zdv82E1A-list=PLMzs3Hz7vqLbvUvU4zIz6wM2vVscYOD3K