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Air quality monitoring and detection system used in the indoor noise decibel meter carbon dioxide meter noise meter

369.80$

Handheld Portable LCD Display Electromagnetic Radiation Detector Magnetics Field Electric Field Temperature Measurement Device with Sound and Light Slarm Function

68.90$

Multifunctional Nuclear Radiation Detector Electromagnetic Radiation Detection Device X γ Hard β Rays Real Time Monitoring Machine LCD Display with Sound Alarm Function

349.90$

Wall Mounted Digital LED Screen Sound Level Meter Decibel Tester Temperature-hygrometer 30dB to 130dB Rechargeable

96.60$

Zigbee Gateway Hub, Smart WiFi/Bluetooth/ZigBee 3.0 Gateway USB Gateway, Smart Hub Wireless Bridge Work with Alexa Google Home, 210° BendableAPP Control

49.99$