Features: brand new and high quality Built-in 800 mA battery, the charging for time is shortened by 30%, the normal use for time is 4 days, and the standby for time is 20 days. Built-in high-quality bluetooth-compatible noise reduction speaker, the sound quality is shocking, clear and realistic, the sound texture is clear, and it is light and has no sense of wearing. Calls, call reminders, music, heart rate monitoring, calories, sedentary reminders, sleep monitoring, step counting, alarm clocks, etc. Fully compatible, support IOS and installation system mobile phone tablet/desktop computer and other devices. Separate bluetooth-compatible headset design, OLED color screen, clear text display and high recognition. Specifications: Material:Plastic Plating Length:4.8cm/1.89inches Width:1.8cm/0.71inches Height:1.3cm/0.51inches Color:Black/Gray Model: Y3PLUS Screen size: 0.96 color screen Battery capacity: 80 mA Operation mode: for touch + button Interface: USB 2.0 Wireless distance: 5m (inclusive) -10m (inclusive) Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Earphone 1x Bottom Bracket 1x Manual + Warranty- Card 1x Certificate of Conformity 1x Charging Cable