The AI310 Astral is a compact, handheld analog meter built in a rugged metal case and CE-certified. When using the supplied AC adapter/charger, the AI310 will operate with or without the optional battery (Part # 11640) installed. The model has a USB interface and may be powered via the USB port. When the meter is turned on, it will check for the presence of a detector. The operating parameters of any Astral detector are automatically loaded into the meter through the detector’s connector. In normal operating mode these meters check for a detector every 15 seconds, allowing for hot swapping of detectors with no user intervention required.