Reed Instruments R8090 (SC-05) Sound Level Calibrator for 1/2" Diameter Microphones, +/-0.5dB Accuracy,Black ULATI And the rope is twined

And the rope is twined

but it folds up for easy transport and storage

portable for reading on airplane

【Application】Make or repair thread

Gardner Bender is an industry-leading manufacturer of professional electrician’s tools and supplies

Reed Instruments R8090 (SC-05) Sound Level Calibrator for 1/2" Diameter Microphones, +/-0.5dB Accuracy,Black ULATI And the rope is twinedBrand: REED Instruments Color: Black Features: Generates stable acoustic signal at a controlled frequency and amplitude to verify the accuracy of your sound level meter Simply place calibrator on microphone, turn on and adjust your sound level meter Output sound pressure levels of 94dB and 114dB Accuracy of + 0. 5dB Accomodates 1 2 inch diameter microphones model number: R8090 Part Number: R8090 Details: This sound calibrator generates a stable