? ??Main Host

●Display: 4.3 inch color TFT LCD capacitive touch screen

●Signal input channel: TEV × 1, air-coupled ultrasonic × 1

●Power interface: DC 12V

●Headphone jack: 3.5mm

●?Data storage: support TF card storage and derived

●Battery: 12V, 2500mAH

●Operating time: more than 4 hours

●Weight: <1kg

●Size: Body size: 240mm×240mm×80mm

●Handle size: 146mm×46.5mm×40mm

? ?

? TEV measurement

●Sensor type: capacitive coupling

●Sensor installation method: built-in

●Frequency range: 10～100MHz

●Measuring range: 0～50dB

●Accuracy: ±1dB

●Resolution: 1dB

●Ultrasonic measurement

●Sensor type: air coupled

●Sensor specifications: built-in

●Resonance frequency: 40kHz±1kHz

●Measuring range: -10dBuV～70dBuV

●Sensitivity: -68dB (at 40.0kHz, 0dB=1 Volt/μbarrms SPL)

●Accuracy: ±1dB

●Resolution: 1dB

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? ?Power supply

●Normal working time: more than 4 hours

●Battery protection: When low voltage is measured, please charge it in time.

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? ? Battery charger

●Rated voltage: 100-240V

●Frequency: 50/60Hz

●Charging voltage: 12V

●Charging current: 0.5A

●Time required for full charge: about 7 hours

●Working temperature: 0-55℃