✅ 4-in-1 Smart Monitoring Simultaneously track noise levels (dB), temperature (°C/°F), humidity (%), and time on one screen—no need for multiple devices. ✅ Crystal-Clear 11" LED Display The oversized anti-glare screen ensures visibility even in bright environments. Adjust brightness with a single click (▲/▼) for day/night use. ✅ Professional-Grade Accuracy Advanced semiconductor sensors deliver ±1.5dB precision (50Hz-8.5kHz range), outperforming standard classroom/office noise meters. ✅ Wall-Mount or Tabletop Flexibility Includes mounting brackets + non-slip pads. Perfect for permanent installation or portable monitoring across rooms. ✅ 10-Hour Battery & Fast Charging The 2000mAh battery lasts a full school/workday. Recharge via any USB port (phone charger/power bank compatible).
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