商品説明
CE Approval
32kHz crystal on board (it's much better at keeping time accurately now)
Pads for a Lithium Ion charger IC (if you want to fit one)
Slightly moved, but much stronger Micro USB connector
Much lower power voltage regulator - the old board drew 0.1mA in sleep, this one draws 0.03mA!
Solder jumped so you can turn the reset button into a second general purpose button
