DC Rainmaker信了，你信嗎
(DC rainmaker暗示測試的準確度與garmin心跳帶同級,應該近期會放比較數據出來)
http://www.kickstarter.com/projects/alphaheartrate/alpha-the-holy-grail-of-heart-rate-look-ma-no-hand
內文搜尋
從 APP 打開
X