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MaxFR Narrowband Emission Line Filters for Fast Optical Systems
Fully multi-coated optics with blackened edges for good light transmission and minimal reflections
DSLR photography (astro modified): Good
Cooling up to 35°C below ambient temperature
Retekess TR503 FM Tour Guide System Wireless Microphone Translation Service Pager MaxFR Narrowband Emission Line FiltersRetekess TR503 FM Tour Guide System Wireless Microphone Translation TR503 Tour Guide System Support Limitless Radio Receivers FM Transmitter FM transmitter The transmit frequency of this wireless microphone adjustable from 87MHz to 108MHz. 30 meters transmission distance in the open air. High sensitivity microphone Hands free and 16 levels of volume adjustable Rechargeable battery Built in rechargeable lithium battery, about 8 hours of continuous use.
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