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DR(dynamic range)
ECG300G three channel ECG is such a kind of electrocardiograph
Zoom objective lens: 180mm-300mm
high-quality
Single-phase 220V 50Hz/60Hz
Optical Trial Lens Frame for DR(dynamic range)Summary: It is suitable for eyesight examination in spectacles shops, department of ophthalmology in hospitals, schools and enterprises. Detailed Product Description: 1. Range of PD adjustments: PD of both eyes: 50~76mm; Left or right PD: 24~40mm,Minimum Calibration Value: 1mm. 2. Axial calibration on each disc: Left disc: 120~0~135,Right disc: 45~180~60,Axial calibration increases counter clockwise along the lens frame axis, and the calibration
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