Uses one of these, with a slot cut in the case, piece of acrylic on top.
Meter is powered from a button cell, to save space.
No external switches - to avoid water ingress - just hold your phone case close to switch the display on.
Reed switch inside the case is operated by the magnet on the phone case clasp.
Meter is powered from a button cell, to save space.
No external switches - to avoid water ingress - just hold your phone case close to switch the display on.
Reed switch inside the case is operated by the magnet on the phone case clasp.
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