Here is some info on this item from the mfg.:
https://headwatches.com/wp-content/uploads/2017/01/HE-002-English-IM.pdf
I was concerned about power use and requirements. That ^....manual..?...instruction book...?...was not helpful, though it fails to discuss recharging, so, accidentally, it was informative.
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So, there is a tool, included, but an authorized facility should change batteries, every few...hours?...days?....years?
Bottom line, an "active" product should be designed (and marketed) to be very efficient, and this one should charge itself from minimal solar power. None of that appears to be the case, which is unfortunate, this design is one I find quite appealing, at the Massdrop price anyways.
I was concerned about power use and requirements. That ^....manual..?...instruction book...?...was not helpful, though it fails to discuss recharging, so, accidentally, it was informative.
Bottom line, an "active" product should be designed (and marketed) to be very efficient, and this one should charge itself from minimal solar power. None of that appears to be the case, which is unfortunate, this design is one I find quite appealing, at the Massdrop price anyways.