Key benefits Accurate level and voltage measurement across a wide dynamic range so you can verify signals quickly and reliably. Clear specification of dB and dBm ranges enables consistent audio and RF level checks and easier comparison between devices. Good frequency response and low error at 1 kHz make this unit practical for routine bench testing, system calibration, and troubleshooting. What this product does Measures voltage, sound/signal level in decibels (dB), and power-referenced level in dBm with defined accuracy and frequency response bands. Supplies clear, repeatable readings that help locate faults, confirm signal integrity, and verify component or system performance. Key specifications Measurement range (Voltage): 300V-100V dB range: -70 dB to +40 dB dBm range: -80 to dBm (0 dB = 1 Vrms; 0 dBm = 0.755 V) Accuracy: <3% at 1 kHz level Frequency response: 5 Hz–1 MHz: 10% ; 10 Hz–500 kHz: 5% Performance and usability Designed for reliable measurement across the specified dB and voltage ranges, with stated frequency-response tolerances so you know the expected error bands at different frequencies. Less than 3% error at 1 kHz provides confidence for common audio and signal-level checks. The dB and dBm references are stated explicitly (0 dB = 1 Vrms, 0 dBm = 0.755 V) to ensure correct interpretation of results and compatibility with other test equipment. Compatibility and integration Works with standard signal and audio test setups that require voltage, dB, or dBm readings within the listed ranges. Useable in lab benches, repair benches, production test lines, or field service tools where the specified ranges and response tolerances meet the test requirements. Practical use cases Audio system verification: measure signal levels and confirm amplifier or speaker input/output within the -70 dB to +40 dB range and check response consistency around 1 kHz. Equipment troubleshooting and bench work: diagnose faults by measuring voltage and level across components and compare readings against expected dBm/dB values. Production or quality checks: perform repeatable frequency-response spot checks within 10 Hz–500 kHz (±5%) and broader checks up to 1 MHz (±10%) to ensure products meet required signal response criteria. What makes it stand out Explicit dB/dBm and voltage ranges with defined frequency-response tolerances and stated 1 kHz accuracy give clear expectations for measurement performance. The specification set supports both audio and broader signal-level testing needs without ambiguity about reference points. Notes Refer to the stated ranges and tolerances when planning tests to ensure the device meets your application requirements.