Support GPS + LBS + WIFI + G-SENSOR relocation. Support call function, replaceable NANO SIM card. Support pedometer, sleep, sedentary reminder and health step management. Support track positioning, support for electronic fence, support SOS a key help, and send the information to the platform management system, and automatically call the emergency contact. Support heart rate measurement, blood pressure measurement and so on. Built-in polymer rechargeable battery 480mah. To achieve more than 4 days of use time. Exclusive magnetic charging. Waterproof level: IP67. Specification:Touch Screen:No; Band Material:Silica; Function:Activity Tracker; Language:English; Application Age Group:AdultCase Material:Plastic; GPS Real time tracking:GPS+WIFI+LBS positioning; Low battery alert:sos /calling/sms control; Voice message:past movement records. Package Includes: 1 x Smart Watch, 1 x User Manual, 1 x Screwdriver, 1 x Charging Cable, 1 x SIM Extractor Pin