... -reflective TFT LCD, visible clearly in field 4. 1.6m extra-short event dead zone 5. 0.25m high ... Range11310nm/1550nm ±20nm 28/26dB Event Dead Zone ≤1.6m Applicable Fiber Single-mode Distance Range 4, 8, 16 ... 32, 64, 128, 256km Sampling Resolution 0.25, 0.5, 1, 2, 4, 8, 16mPulse width10, 30, 80, 160, ... 20V(3A), AC adapter 100~240V, 50/60Hz, 1.5A Built-in Lithium battery 4400mAh,7.4V,operating ...