Which source should I use for power supply from USB?
The detector with 2x LR6 / USB power supply is fitted with battery holders and a USB micro power supply connector. The detector can be powered only by batteries or through a USB connector, or it can be fitted with batteries and power from the USB connector. In this case, when the power supply from the ISB connector is interrupted, the detector automatically switches to battery power supply.
You can use an ordinary adapter for 230VAC with USB micro connector as power supply, if the current carrying capacity exceeds 300mA, or you can use an universal grid source with USB 2.0 connector and a cable fitted with a USB connector on one end and USB micro connector on the other. In this case the current carrying capacity of the source must exceed 300mA.