Biketronics BT4180 and BT4250

Size comparison to iPhone 6s:
Attachment 7754

BT4250 (top) | BT4180 (bottom):
Attachment 7760

BT4180:
Attachment 7755
Attachment 7756
Attachment 7757
Attachment 7758
Attachment 7759

BT4250:
Attachment 7761
Attachment 7762
Attachment 7763

It's amazing how small they're compare with specs!


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