To preserve the internal lithium battery, the device turns off automatically after . If the meter suddenly powers down during a static evaluation, simply turn it back on using the Power button. If you'd like, let me know: ERICKHILL RT-100 EMF Meter
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: This device is intended for AC mains wiring and low-frequency radiation; it does detect infrared light. Maintenance The device is often sold with a hard storage case to protect its sensors from physical damage. To preserve the internal lithium battery, the device