【3 Calibration Level】DANOPLUS sound calibrator features 3 calibration levels and operates at a frequency of 1000 Hz. With a cavity diameter of 13.2 millimeters, align the microphone with the calibrator's cavity during use to prevent damage
【Portable】The sound meter calibrator is powered by 2 AA batteries, making it portable. It can be carried in a pocket, handbag, or even concealed in a sleeve
【Low Power Indicator】When the battery is low, a red light will illuminate to remind you to replace the batteries, ensuring the decibel meter calibrator functions properly
【User-fridendly】The universal design allows this SPL calibrator to be compatible with many sound level meters, making it very convenient to use
【Multi-function】The precise decibel meter calibrator features the following functions: Low Power Indicator, Portable, auto power off, switch Calibration Level (114dB / 94dB / 104dB)
