''Features'
● The instrument uses advanced digital signal processing technology and digital filter circuit, can overcome the interference of environmental noise, automatically distinguish between environmental noise and leakage noise signal.
● Commonly used frequency range of spectrum analysis, real-time display of the noise signal at the frequency of the relative distribution.
● Automatic recording (time-signal noise) curve, continuous monitoring of the noise signal, to determine the leakage point to provide a reliable basis for the analysis.
● The pick-up sensor has a built-in signal amplification circuit. The vibration picking mechanism adopts buffer isolation, which makes the direction of picking vibration stronger, and effectively reduces the interference caused by ambient wind and wire jitter to pick up the vibration sensor.
● high-quality sensor materials and circuits, listening clarity greatly improved.
● timely preservation of multiple audio recordings, can record the sound of the scene, at any time to reproduce the scene of detection of the scene.
● The operating handle adopts the photoelectric type non-contact mute switch with high reliability, which avoids the occurrence of the bad contact fault of the switch.
● The front of the handle lighting, LCD screen and buttons are with backlighting.
● High-performance, high-capacity rechargeable lithium-ion battery, no memory effect; online charging and offline charging can be used in two ways, convenient and fast charging.
● large-screen LCD display, large amount of information, light bar display high precision, intuitive interface clear, simple and convenient operation.
● Excellence in circuit board design, eliminating the similar instruments at home and abroad to overcome the difficult to overcome the noise generated by the digital circuit pulsation noise.

'Main Specifications'
● Audio amplification gain: 100dB adjustable
● Frequency range: 50 ~ 5000 Hz, covering all leakage noise range
● Frequency bins: 31 center frequencies and common frequency bands are available for operator selection
● Four detection modes:
1. Spectrum analysis mode (100Hz, 200Hz, 300Hz, 400Hz, 600Hz, 1KHz, 2KHz, 3KHz total of eight common frequency noise signal instantaneous value display)
2. Bar display mode (noise signal instantaneous value display)
3. Fine-tuning mode (noise signal minimum memory display)
4. Point measurement mode (5, 10, 20, 30 minutes, time-signal noise minimum curve)
● 8-segment audio recording (each section has a 1 minute recording time and playback, and can delete the duplicate recording)
● 160 * 128 graphics dot matrix large-screen LCD display (with LED backlighting)
● Power supply (8.4V lithium-ion rechargeable battery pack):
Continuous working time ≥ 40 hours (backlight off)
≥25 hours (backlight on)
● fully automatic smart charger, fully charged time ≤ 4 hours
● Operating temperature: -10 ℃ ~ +50 ℃
● Storage temperature: -20 ℃ ~ +70 ℃
● Instrument weight, Dimensions:
Host dimensions (length × width × height): 22.8 cm × 11.4 cm × 11.4 cm
Host weight (including battery): 1.34 kg (of which the battery weighs 0.24 kg)
Pick up sensor: 0.56 kg
Handle and cable: 0.20 kg
Monitor headphones: 0.30 kg