I buy this smart band a month ago this not accurate. While I traveling it counts the distance as I walking on feet. It is not screch proof and battery backup is for just 5 days. The Bluetooth range is very bad max 5 to 7 meter and disconnect. Lenovo HW01 not displaying the text massage notification. Some time the heart rate monitor is also not accurate. Very bad lenovo I love lenovo product but this is break my heart.