I don't usually leave a review. This is fantastic product. I use it to check my heart rate during my jiu jitsu practice. - Comfort: On the left arm and no problem with rolling with other people. Compared to other chest strap, much better - Solid connectivity: connectivity to iPhone is fantastic. I've never lost a signal in my iPhone app when I was recording my activity. Other product, I cursed a lot because whenever I get little bit far away from my apple watch or iphone which is recording the activity, I lost the signal and I had to reconnect numerous times - Durability: I forgot that I put this with my laundry. So wash and high heat dry. I thought it's gone. I bought only couple of days ago but I was ready to buy again if it was broken because I liked it so much. Surprisingly, it survived Initially, self recording function and comfort were the reasons I bought it but the connectivity was so good. So I didn't really need to use self recording but it worked very well though.

落等到安排到送貨所用的時間非常短，星期六晚落單，星期一送到，同埋價錢超平，平過市價。