Features 1、PORTABLE POWER METER: Handheld power meter with stable light source and high stability output power, featuring 3 modulation frequencies, useful and practical 2、UNIVERSAL INTERFACE: Optical power meter equipped with a 2.5mm interface, including SC connectors, ideal for telecom and cable TV maintenance and testing 3、SHOCKPROOF DESIGN: Fiber optic tester external protective layer is made of black soft rubber shell effectively prevent damage from drops or collisions 4、ACCURATE DETECTOR: Power meter with for InGaAs detector type, wavelength response range of 850‑1650nm, measuring range of ‑70 to +10dbm, accuracy of ±2dB 5、VERSATILE USAGE: Light power meter feature universal connectors FC, SC, ST, 3 x AAA batteries(not included), operating temperature ‑10 to +60℃, and frequency recognition of 270, 330, 1k, 2kHz Specification Item Type: Optical Power Meter Detector Type: For InGaAs Wavelength Range: 850-1650nm Measurement Range: -70 to +10dbm Resolution: 0.01dB Accuracy: ±2dB Connector: Universal connector FC, SC, ST Battery Type: 3 x AAA batteries(not included) Operating Temperature: -10 to +60℃ Frequency Identification: 270, 330, 1k, 2kHz Package List 1 x Fiber Optic Power Meter