1. Wavelength: S 1310/1550nm M850/1300nm MS 850/1300/1310/1550nm (optional) PON 1310/1490/1550 (optional) 2. Output power: -5dBm 3. Optical connector: SC+2.5mm universal (1.25mm LC optional) 4. Power supply: alkaline battery 3 AA 1.5V battery (not included) 5. Output stability: 0.05dB/15mins; 0.1dB/8hours 6. Modulation frequency: CW, 270Hz, 1KHz, 2KHz 7. Removable silicone cover, shockproof and drop-proof, reducing collision damage and extending service life 8. With continuous wave output and 3 modulation frequencies of 270Hz/1000Hz/2000Hz 9. Backlight LED display, no fear of working in dark environment, thereby improving work efficiency. Note: 10. Multi-mode MS does not have LED lights 11. Size: 160x85x45mm 12. Weight: 220g