Discover the professional sound level meter with built-in data logger. This sound meter offers both A and C weighting, with slow and fast response capabilities. The USB interface, compatible with Windows OS, guarantees real-time monitoring and recording via your computer. With an impressive memory for 262144 measurements, automatic and manual start functions, and analog AC/DC outputs for various devices, this is a device that offers accuracy and versatility. professional sound level meter sonometer pressure decibel screen display datalogger usb interface windows os real time monitoring pc a c weighting response measurements memory bank analog output frequency analyzer automatic shutdown accuracy: ± 1.4 dB * frequency range: 31.5 Hz to 8 kHz * dynamic range: 50 dB * measuring range: 30 dB to 130 dB * storage capacity (measuring points): 262144 * sampling frequency: 2 x / sec. * frequency weighting: A, C * measuring frequency: fast (125 ms), slow (1 s) * microphone: electret condenser microphone (12.7mm) * type of plug: USB * power supply: 1 x 9 V battery, 6F22 (incl.) * working temperature / humidity level: -20 - 60 °C (-4°F - 140 °F) / 10 - 90 % RH * max. Operating altitude: < 2000 m * Storage temperature / humidity: -20 - 60 °C (-4°F - 140 °F) / 10 % - 75 % RH * Dimensions: 252 x 66 x 33 mm * Weight (with battery): 258 g * Battery life: ± 11 h (in continuous mode) * Power supply (optional): PSSMV1 9 V 1.3 A - connector: 1.35 x 3.5 mm